/in/foo.c:1:3: error: invalid preprocessing directive #\U00008bfb\U000053d6\U00008f93\U00005165
    1 | # 读取输入
      |   ^~~~~~~~
/in/foo.c:2:1: warning: data definition has no type or storage class
    2 | nums = list(map(int, input().split(',')))
      | ^~~~
/in/foo.c:2:1: warning: type defaults to 'int' in declaration of 'nums' [-Wimplicit-int]
/in/foo.c:2:8: warning: implicit declaration of function 'list' [-Wimplicit-function-declaration]
    2 | nums = list(map(int, input().split(',')))
      |        ^~~~
/in/foo.c:2:13: warning: implicit declaration of function 'map' [-Wimplicit-function-declaration]
    2 | nums = list(map(int, input().split(',')))
      |             ^~~
/in/foo.c:2:17: error: expected expression before 'int'
    2 | nums = list(map(int, input().split(',')))
      |                 ^~~
/in/foo.c:3:1: error: expected ',' or ';' before 'k'
    3 | k = int(input())
      | ^
/in/foo.c:6:3: error: invalid preprocessing directive #\U00005207\U00007247\U00005206\U00007ec4\U0000ff0c\U00006b65\U0000957fk
    6 | # 切片分组，步长k
      |   ^~~~~~~~~~~~~~~