My accepted solution

#include <bits/stdc++.h>
 
using namespace std;
 
const int maxx5 = 1e5 + 5;
int main() {
    int n, h, x;
    cin >> n >> h;
 
    vector <int> a(n);
    for (int i = 0; i < n; i ++) {
        cin >> a[i];
    }
    int pos = 0;
    bool flag = false;
    while (cin >> x) {
        if (x == 0) {