View Compilation Error

0_0_36200402_26216.cpp:1:1: error: 'include' does not name a type
 include <bits/stdc++.h>
 ^
0_0_36200402_26216.cpp: In function 'int main()':
0_0_36200402_26216.cpp:30:32: error: 'memset' was not declared in this scope
     memset(memo,-1,sizeof(memo));
                                ^
0_0_36200402_26216.cpp:33:5: error: 'cin' was not declared in this scope
     cin >> t;
     ^
0_0_36200402_26216.cpp:40:9: error: 'cout' was not declared in this scope
         cout << mantap(arr[i]) << endl;
         ^
0_0_36200402_26216.cpp:40:35: error: 'endl' was not declared in this scope
         cout << mantap(arr[i]) << endl;
                                   ^