Submission #391561

#	Time	Username	Problem	Language	Result	Execution time	Memory
391561		bayemirov	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	33 ms	6268 KiB

Main

#include <bits/stdc++.h>

#define pb push_back

using namespace std;

typedef long long ll;

const int N = 3e5;
const ll INF = 1e18;

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

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