View Compilation Error

0_0_21182669_30290.cpp:1:1: error: 'include' does not name a type
 include <iostream>  
 ^
0_0_21182669_30290.cpp: In function 'int main()':
0_0_21182669_30290.cpp:50:11: error: 'cin' was not declared in this scope
     while(cin>>n>>m>>t,t+n+m)  
           ^
0_0_21182669_30290.cpp:70:13: error: 'cout' was not declared in this scope
             cout<<"NO"<<endl;  
             ^
0_0_21182669_30290.cpp:70:25: error: 'endl' was not declared in this scope
             cout<<"NO"<<endl;  
                         ^
0_0_21182669_30290.cpp:78:13: error: 'cout' was not declared in this scope
             cout<<"YES"<<endl;  
             ^
0_0_21182669_30290.cpp:78:26: error: 'endl' was not declared in this scope
             cout<<"YES"<<endl;  
                          ^
0_0_21182669_30290.cpp:80:13: error: 'cout' was not declared in this scope
             cout<<"NO"<<endl;  
             ^
0_0_21182669_30290.cpp:80:25: error: 'endl' was not declared in this scope
             cout<<"NO"<<endl;  
                         ^