/in/foo.cc: In function 'int main()':
/in/foo.cc:5:31: 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.cc:5:31: warning: format '%ld' expects argument of type 'long int*', but argument 3 has type 'long long int*' [-Wformat=]
/in/foo.cc:5:31: warning: format '%ld' expects argument of type 'long int*', but argument 4 has type 'long long int*' [-Wformat=]
/in/foo.cc:6:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%ld\n", (a+b)/c);
                         ^