/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | year=int(input(""))
      | ^~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'year' [-Wimplicit-int]
/in/foo.c:1:6: error: expected expression before 'int'
    1 | year=int(input(""))
      |      ^~~
/in/foo.c:2:13: error: invalid suffix "and" on integer constant
    2 | if((year%4==0and(year%100)!=0)or(year%400==0)):
      |             ^~~~