Submission #1032109

#	Time	Username	Problem	Language	Result	Execution time	Memory
1032109		juicy	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	22 ms	7008 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

const int N = 2e5 + 5;
const long long inf = 1e18;

int n;
int a[N], d[N];
long long pf[N], sf[N];

int main() {
	ios::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) {
		d[i] = a[i] - a[i + 1];
	}
	for (int i = 1; i < n; ++i) {
		pf[i] = pf[i - 1] +  max(0, d[i] + 1);
	}
	for (int i = n - 1; i >= 1; --i) {
		sf[i] = sf[i + 1] + max(0, -d[i] + 1);
	}
	long long res = inf;
	for (int i = 1; i <= n; ++i) {
		res = min(res, max(pf[i - 1], sf[i]));
	}
	cout << res;
	return 0;
}

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