Submission #71479529

---

Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#define debug(arg) cout << "[" << #arg << "]: " << arg << endl
#else
#define debug(arg) 42
#endif

using llu = uint64_t;
using ll = int64_t;

#define vec vector
#define pb push_back
#define all(n) begin(n), end(n)

void solv() {
	int n; cin >> n;
	vec<int> a(n); for (auto &i : a) cin >> i;
	int l = 0, r = 0;
	while (r < n - 1) {
		int mxj = r;
		for (int i = l; i <= r; ++i) mxj = max(mxj, a[i] + i - 1);
		mxj = min(mxj, n - 1);
		if (mxj == r) break;
		l = r + 1;
		r = mxj;
		debug(l << ' ' << r);
	}
	cout << r + 1 << '\n';
}

signed main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int t = 1;
	//cin >> t;
	while (t--) solv();
	return 0;
}

Submission Info

Judge Result