Đưa ra một danh sách các số nguyên có các phần tử trùng lặp trong đó. Nhiệm vụ là tạo một danh sách khác, chỉ chứa các phần tử trùng lặp. Nói một cách đơn giản, danh sách mới phải chứa các phần tử xuất hiện dưới dạng nhiều hơn một
ví dụ
Input : list = [10, 20, 30, 20, 20, 30, 40, 50, -20, 60, 60, -20, -20] Output : output_list = [20, 30, -20, 60]
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]
Phương pháp 1. Sử dụng phương pháp Brute Force
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]0
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]1
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]2
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]4
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]6
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]8
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]9
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]31____17
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]38
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]39
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21____17
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]38
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]31
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]32
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]34
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]38
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]34
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]31
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]29
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]27_______223
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]29
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]29
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]29
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]3
Phương pháp 2. Sử dụng một vòng lặp đơn
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]27
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]29
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]34
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36____137
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]43
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]49
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]51
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]53
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36______220
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]57
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]59
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]61
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]2
Phương pháp 3. Sử dụng chức năng Counter[] từ mô-đun bộ sưu tập
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]62
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]63
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]64
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]65
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]66
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]301
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]303
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22____1305
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]306
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]308
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]309
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]311
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]301
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]315
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]317
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]319
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]3
Phương pháp 4. Sử dụng phương thức đếm[]
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]320
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]321
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]308
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]357
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]359
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]360
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]361
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]362
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]364
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]308
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]368
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]369
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]371____17
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]308
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]374
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]376
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]378
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]381____225
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]386
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]389
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]390
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]391
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]32
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]393
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]395
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]396
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]2
Phương pháp 5. Sử dụng phương pháp hiểu danh sách
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]398
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]308
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]202
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]203
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]204
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]206
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]208
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]210
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]212
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]214
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]217
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]208
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]257
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]258
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]2
Phương pháp 6. Sử dụng cách tiếp cận từ điển danh sách [không có bất kỳ chức năng đếm sẵn nào]
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]398
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]262
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]264
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36______137
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]269
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20 ________ 136 ________ 137 ________ 2275
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]32
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]277____17
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]281
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]32
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]277____224
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]290______137
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]292
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]295
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]32
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]299
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]306
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]214
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]217
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]208
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]257
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]258
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]2
Phương pháp 7. Sử dụng toán tử in, not in và phương thức đếm[]
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]29
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]206
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]387
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36____137
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]43
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]399
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]201
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]36____137
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]399
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]5
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]208
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]367
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]20
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]212
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]214
Đầu ra
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]2
Phương pháp 8. Sử dụng hàm liệt kê
Python3
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]208
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]7
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]10
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]12
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]04
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]14
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]24
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]26
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]28
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]23
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]30
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]21
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]22
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]202
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]308
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]202
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]203
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]204
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]35
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]257
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]37
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]259
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]260
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]33
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]210
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]25
Input : list = [-1, 1, -1, 8] Output : output_list = [-1]264