/in/foo.cc: In function 'int main()':
/in/foo.cc:5:22: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'long long int*' [-Wformat=]
  scanf("%ld%ld",&a,&b);
                      ^
/in/foo.cc:5:22: warning: format '%ld' expects argument of type 'long int*', but argument 3 has type 'long long int*' [-Wformat=]
/in/foo.cc:7:16: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%ld",c);
                ^