View Compilation Error

0_0_13605217_22056.cpp: In function 'int main()':
0_0_13605217_22056.cpp:18:25: error: 'cout' was not declared in this scope
         if (t <= N - m) cout << m << endl;
                         ^
0_0_13605217_22056.cpp:18:38: error: 'endl' was not declared in this scope
         if (t <= N - m) cout << m << endl;
                                      ^
0_0_13605217_22056.cpp:19:14: error: 'cout' was not declared in this scope
         else cout << N - t << endl;
              ^
0_0_13605217_22056.cpp:19:31: error: 'endl' was not declared in this scope
         else cout << N - t << endl;
                               ^