View Compilation Error

0_0_35704260_14180.cpp: In function 'int main()':
0_0_35704260_14180.cpp:9:2: error: 'cin' was not declared in this scope
  cin>>n>>m;
  ^
0_0_35704260_14180.cpp:12:3: error: break statement not within loop or switch
   break;
   ^
0_0_35704260_14180.cpp:37:8: error: 'cout' was not declared in this scope
        cout<<NULL<<endl;
        ^
0_0_35704260_14180.cpp:37:20: error: 'endl' was not declared in this scope
        cout<<NULL<<endl;
                    ^
0_0_35704260_14180.cpp:42:9: error: 'cout' was not declared in this scope
         cout<<c[l];
         ^
0_0_35704260_14180.cpp:43:9: error: 'cout' was not declared in this scope
         cout<<endl;
         ^
0_0_35704260_14180.cpp:43:15: error: 'endl' was not declared in this scope
         cout<<endl;
               ^