#include "bits/stdc++.h" #define int long long using namespace std; using ll = long long; using P = pair; const ll INF = (1LL << 61); ll mod = 1000000007; signed main() { ios::sync_with_stdio(false); cin.tie(0); int N; cin >> N; vectorA(N); for (int i = 0; i < N; i++)cin >> A[i]; int now = 1; bool ok = true; for (int i = 0; i < N; i++) { if (A[i] == 1) { } else if (A[i] == 0) { now = 1; ok = false; } else { if (!ok) { now = 1; } else { now++; } } cout << now << endl; } return 0; }