/in/foo.c:1:1: warning: data definition has no type or storage class
 a = int(input())
 ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:1:5: error: expected expression before 'int'
 a = int(input())
     ^~~
/in/foo.c:3:7: warning: multi-character character constant [-Wmultichar]
 print('Yes')
       ^~~~~
/in/foo.c:5:7: warning: multi-character character constant [-Wmultichar]
 print('No')
       ^~~~