#include <algorithm> #include <iostream> // you can write to stdout for debugging purposes, e.g. // cout << "this is a debug message" << endl; int solution(vector<int> &A) { // write your code in C++14 (g++ 6.2.0) int n = A.size(); std::sort(A.begin(),A.end()); vector<int>B; for(int i = 1; i<=n; i++) { B.push_back(i); } if(B==A) { return 1; } return 0; }