/in/foo.cc: In function 'int main()':
/in/foo.cc:10:14: error: expected initializer before 'n'
  long long l n,m;
              ^
/in/foo.cc:12:7: error: 'n' was not declared in this scope
  cin>>n>>m;
       ^
/in/foo.cc:12:10: error: 'm' was not declared in this scope
  cin>>n>>m;
          ^