/in/foo.c: In function 'main':
/in/foo.c:6:11: warning: format '%ld' expects argument of type 'long int *', but argument 2 has type 'long long int' [-Wformat=]
  scanf("%ld%ld%ld",a,b,c);
           ^
/in/foo.c:6:14: warning: format '%ld' expects argument of type 'long int *', but argument 3 has type 'long long int' [-Wformat=]
  scanf("%ld%ld%ld",a,b,c);
              ^
/in/foo.c:6:17: warning: format '%ld' expects argument of type 'long int *', but argument 4 has type 'long long int' [-Wformat=]
  scanf("%ld%ld%ld",a,b,c);
                 ^
/in/foo.c:8:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d",a);
           ^
/in/foo.c:6:2: warning: 'a' is used uninitialized in this function [-Wuninitialized]
  scanf("%ld%ld%ld",a,b,c);
  ^~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:6:2: warning: 'b' is used uninitialized in this function [-Wuninitialized]
/in/foo.c:6:2: warning: 'c' is used uninitialized in this function [-Wuninitialized]