Submission #4024619

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

int main() {

  int N;
  cin >> N;
  vector<int>a(N);
  for (int i=0; i<N;i++){
    cin >> a.at(i);
  }
  vector<int>b(N);
  b.at(0) = 1;
  for (int j=1;j<N;j++){
    b.at(j) = a.at(j-1);
    if (b.at(j) == 2){
      cout << j << endl;
    }
    else if(j == N-1)
      cout <<-1 << endl;
    else
      continue;
  }}

Submission Info

Judge Result