Submission #696326

#	Time	Username	Problem	Language	Result	Execution time	Memory
696326		yaufung	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	26 ms	6968 KiB

Main

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

int main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n;
	cin >> n;
	long long ans = 0;
	vector<long long> a(n + 5);
	vector<long long> l(n + 5);
	vector<long long> r(n + 5);
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	for (int i = 2; i <= n; i++) {
		l[i] = l[i - 1];
		l[i] += max(0ll, a[i - 1] - a[i] + 1);
	}
	for (int i = n - 1; i > 0; i--) {
		r[i] = r[i + 1];
		r[i] += max(0ll, a[i + 1] - a[i] + 1);
	}
	ans = 1e18;
	for (int i = 1; i <= n; i++) {
		ans = min(ans, max(l[i], r[i]));
	}
	cout << ans << endl;
	return 0;
}

• Subtask 1: 40 / 40
• Subtask 2: 60 / 60