View Compilation Error

0_0_36739304_14162.cpp: In function 'int main()':
0_0_36739304_14162.cpp:6:8: error: 'cin' was not declared in this scope
  while(cin>>x>>y){
        ^
0_0_36739304_14162.cpp:19:3: error: 'cout' was not declared in this scope
   cout<<"Sorry"<<endl;
   ^
0_0_36739304_14162.cpp:19:18: error: 'endl' was not declared in this scope
   cout<<"Sorry"<<endl;
                  ^
0_0_36739304_14162.cpp:23:3: error: 'cout' was not declared in this scope
   cout<<"OK"<<endl;
   ^
0_0_36739304_14162.cpp:23:15: error: 'endl' was not declared in this scope
   cout<<"OK"<<endl;
               ^