View Compilation Error

0_0_37599090_10368.cpp: In function 'int main()':
0_0_37599090_10368.cpp:5:9: error: 'cin' was not declared in this scope
  while (cin >> m >> n && m >= 100 && n <= 999 && m <= n)
         ^
0_0_37599090_10368.cpp:14:5: error: 'cout' was not declared in this scope
     cout << m << " ";
     ^
0_0_37599090_10368.cpp:20:4: error: 'cout' was not declared in this scope
    cout << "NO" << endl;
    ^
0_0_37599090_10368.cpp:20:20: error: 'endl' was not declared in this scope
    cout << "NO" << endl;
                    ^