View Compilation Error

0_0_33676757_10946.cpp: In function 'int main()':
0_0_33676757_10946.cpp:37:13: error: 'cout' was not declared in this scope
             cout<<"NO"<<endl;
             ^
0_0_33676757_10946.cpp:37:25: error: 'endl' was not declared in this scope
             cout<<"NO"<<endl;
                         ^
0_0_33676757_10946.cpp:39:13: error: 'cout' was not declared in this scope
             cout<<"YES"<<endl;
             ^
0_0_33676757_10946.cpp:39:26: error: 'endl' was not declared in this scope
             cout<<"YES"<<endl;
                          ^