View Compilation Error

0_0_23594276_8049.cpp: In function 'int main()':
0_0_23594276_8049.cpp:155:9: error: 'cin' was not declared in this scope
         cin >> S >> N >> M;  
         ^
0_0_23594276_8049.cpp:159:13: error: 'cout' was not declared in this scope
             cout << "NO" << endl;  
             ^
0_0_23594276_8049.cpp:159:29: error: 'endl' was not declared in this scope
             cout << "NO" << endl;  
                             ^
0_0_23594276_8049.cpp:164:37: error: 'memset' was not declared in this scope
         memset(flag, 0, sizeof(flag));  
                                     ^
0_0_23594276_8049.cpp:167:13: error: 'cout' was not declared in this scope
             cout << "NO" << endl;  
             ^
0_0_23594276_8049.cpp:167:29: error: 'endl' was not declared in this scope
             cout << "NO" << endl;  
                             ^
0_0_23594276_8049.cpp:169:13: error: 'cout' was not declared in this scope
             cout << ans << endl;  
             ^
0_0_23594276_8049.cpp:169:28: error: 'endl' was not declared in this scope
             cout << ans << endl;  
                            ^