#include<bits/stdc++.h> using namespace std; int main() { int n, m; cin >> n; int a[n]; for (int i = 0; i < n; i++) { cin >> a[i]; } cin >> m; int index = -1; for (int i = 0; i < n; i++) { if (a[i] == m) { cout << i+1 << " "; break; } } for (int i = 0; i < n; i++) { if (a[i] == m) { index = i; } } if(index==-1){ cout<<index; }else{ cout<<index+1; } return 0; }