View Compilation Error

0_0_38345899_9218.cpp: In function 'int main()':
0_0_38345899_9218.cpp:15:3: error: expected ';' before '}' token
   }while(next_permutation(a+1,a+n+1));
   ^
0_0_38345899_9218.cpp:15:36: error: 'next_permutation' was not declared in this scope
   }while(next_permutation(a+1,a+n+1));
                                    ^