View Compilation Error

0_0_39759593_13537.cpp: In function 'int main()':
0_0_39759593_13537.cpp:10:12: error: 'cin' was not declared in this scope
   10 |     while (cin >> m >> n && m!= 0 && m!= 0) {
      |            ^~~
0_0_39759593_13537.cpp:17:9: error: 'cout' was not declared in this scope
   17 |         cout << n - m + 1 - sum << endl;
      |         ^~~~
0_0_39759593_13537.cpp:17:36: error: 'endl' was not declared in this scope
   17 |         cout << n - m + 1 - sum << endl;
      |                                    ^~~~