View Compilation Error

0_0_24284998_28611.cpp: In function 'int main()':
0_0_24284998_28611.cpp:21:12: error: 'cin' was not declared in this scope
     while (cin>>N>>M)
            ^
0_0_24284998_28611.cpp:25:33: error: 'memset' was not declared in this scope
         memset(cnt,0,sizeof(cnt));
                                 ^
0_0_24284998_28611.cpp:36:35: error: 'sort' was not declared in this scope
         sort(machine,machine+N,cmp);
                                   ^
0_0_24284998_28611.cpp:56:9: error: 'cout' was not declared in this scope
         cout<<ans<<' '<<money<<endl;
         ^
0_0_24284998_28611.cpp:56:32: error: 'endl' was not declared in this scope
         cout<<ans<<' '<<money<<endl;
                                ^