Submission #372716

#	Time	Username	Problem	Language	Result	Execution time	Memory
372716		SeDunion	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	35 ms	5248 KiB

Main

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1e6 + 66;

ll A[N];

ll p[N], s[N];

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	int n;
	cin >> n;
	for (int i = 1 ; i <= n ; ++ i) {
		cin >> A[i];
	}
	ll ans = ll(1e18);
	for (int i = 2 ; i <= n ; ++ i) {
		p[i] = p[i - 1] + max(0ll, A[i - 1] + 1 - A[i]);
	}
	for (int i = n - 1 ; i >= 1 ; -- i) {
		s[i] = s[i + 1] + max(0ll, A[i + 1] + 1 - A[i]);
	}
	for (int i = 1 ; i <= n ; ++ i) {
		ans = min(ans, max(p[i], s[i]));
	}
	cout << ans;
}

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