View Compilation Error

0_0_34528285_5274.cpp: In function 'int main()':
0_0_34528285_5274.cpp:24:2: error: 'cin' was not declared in this scope
  cin>>t;
  ^
0_0_34528285_5274.cpp:26:31: error: 'memset' was not declared in this scope
   memset(table,0,sizeof(table));
                               ^
0_0_34528285_5274.cpp:44:3: error: 'cout' was not declared in this scope
   cout<<ans<<endl;
   ^
0_0_34528285_5274.cpp:44:14: error: 'endl' was not declared in this scope
   cout<<ans<<endl;
              ^