Submission #1243355

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243355		Bui_Quoc_Cuong	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	13 ms	4272 KiB

Main

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

int n;
int a[5'000'05];
long long pre[5'000'05], suf[5'000'05];

signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> a[i];
	for(int i = 1; i <= n; i++){
		pre[i] = pre[i - 1] + max(0, a[i - 1] - a[i] + 1);
	}
	for(int i = n; i >= 1; i--){
		suf[i] = suf[i + 1] + max(0, a[i + 1] - a[i] + 1);
	}
	long long ans = 1e18;
	for(int i = 1; i <= n; i++){
		ans = min(ans, max(pre[i], suf[i]));
	}
	cout << ans;
	return 0;
}

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