Submission #1027116

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027116		aykhn	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	17 ms	7256 KiB

Main

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

#define inf 0x3F3F3F3F3F3F3F3F
#define int long long

const int MXN = 2e5 + 5;

int n;
int a[MXN];
int p[MXN], s[MXN];

signed main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i];
	a[0] = -inf, a[n + 1] = -inf;
	for (int i = 1; i <= n; i++) p[i] = p[i - 1] + max(0LL, a[i - 1] + 1 - a[i]);
	for (int i = n; i >= 1; i--) s[i] = s[i + 1] + max(0LL, a[i + 1] + 1 - a[i]);
	int res = inf;
	for (int i = 1; i <= n; i++) res = min(res, max(p[i - 1], s[i + 1]) + max(0LL, max(a[i - 1], a[i + 1]) + 1 - a[i]));
	cout << res << '\n';
}

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