View Compilation Error

0_0_29965952_163.cpp: In function 'int main()':
0_0_29965952_163.cpp:18:5: error: 'lon' was not declared in this scope
     lon long m;
     ^
0_0_29965952_163.cpp:19:19: error: 'm' was not declared in this scope
     while(cin>>n>>m)
                   ^