View Compilation Error

0_0_39584457_2678.cpp: In function 'int main()':
0_0_39584457_2678.cpp:4:1: error: 'll' was not declared in this scope
    4 | ll n, m;
      | ^~
0_0_39584457_2678.cpp:5:14: error: 'n' was not declared in this scope
    5 | while(cin >> n >> m) {
      |              ^
0_0_39584457_2678.cpp:5:19: error: 'm' was not declared in this scope; did you mean 'tm'?
    5 | while(cin >> n >> m) {
      |                   ^
      |                   tm