/in/foo.c: In function 'main':
/in/foo.c:5:11: warning: format '%ld' expects argument of type 'long int *', but argument 2 has type 'long long int *' [-Wformat=]
  scanf("%ld%ld", &x, &y);
           ^
/in/foo.c:5:14: warning: format '%ld' expects argument of type 'long int *', but argument 3 has type 'long long int *' [-Wformat=]
  scanf("%ld%ld", &x, &y);
              ^
/in/foo.c:13:12: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%ld\n", x);
            ^
/in/foo.c:14:12: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%ld", m*n / x);
            ^