/in/foo.cc:4:15: error: 'LONG_LONG_MAX' was not declared in this scope
 long long MIN=LONG_LONG_MAX,S;
               ^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:10:31: error: 'S' was not declared in this scope
   scanf("%lld%lld%lld",&n,&m,&S);
                               ^