#include <iostream>

#include <vector>

#include <algorithm>

using namespace std;

​

int main() {

  vector<int> numbers = {1, 7, 3, 5, 9, 2};

  auto it = is_sorted_until(numbers.begin(), numbers.end());

  int position = it - numbers.begin();

  cout << "The first " << position << " items are in ascending order.";

  return 0;

}

​