View Compilation Error

0_0_32325696_18128.cpp: In function 'int main(int, const char**)':
0_0_32325696_18128.cpp:26:16: error: 'n' was not declared in this scope
         cin >> n >> m;
                ^
0_0_32325696_18128.cpp:26:21: error: 'm' was not declared in this scope
         cin >> n >> m;
                     ^