/in/foo.cc: In function 'int main()':
/in/foo.cc:14:12: error: 'N' was not declared in this scope
     cin >> N >> M >> K;
            ^
/in/foo.cc:14:17: error: 'M' was not declared in this scope
     cin >> N >> M >> K;
                 ^
/in/foo.cc:14:22: error: 'K' was not declared in this scope
     cin >> N >> M >> K;
                      ^