#include <iostream> using namespace std; int main() { int N, m,n; cin >> N; int arr[666]; for (int i = 0; i < N; i++) { cin >> arr[i]; } cin >> m; for (int i = N-1; i >=0; i++) { if (arr[i] == m) { n=i; } } cout << n << endl; return 0; }