View Compilation Error

0_0_38246153_4921.cpp:1:1: error: 'include' does not name a type
 include <bits/stdc++.h>
 ^
0_0_38246153_4921.cpp: In function 'int main()':
0_0_38246153_4921.cpp:5:9: error: 'cin' was not declared in this scope
  while (cin >> n >> m) {
         ^
0_0_38246153_4921.cpp:11:45: error: 'next_permutation' was not declared in this scope
   } while (next_permutation(a + 1, a + n + 1));
                                             ^
0_0_38246153_4921.cpp:13:4: error: 'cout' was not declared in this scope
    cout << a[i] << " ";
    ^
0_0_38246153_4921.cpp:14:3: error: 'cout' was not declared in this scope
   cout << a[n] << endl;
   ^
0_0_38246153_4921.cpp:14:19: error: 'endl' was not declared in this scope
   cout << a[n] << endl;
                   ^