Submission #617283

#	Time	Username	Problem	Language	Result	Execution time	Memory
617283		Hanksburger	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	29 ms	6988 KiB

Main

#include <bits/stdc++.h>
using namespace std;
long long a[200005], l[200005], r[200005];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long n, ans=1e18;
    cin >> n;
    for (int i=1; i<=n; i++)
        cin >> a[i];
    for (int i=2; i<=n; i++)
        l[i]=l[i-1]+max(0LL, a[i-1]-a[i]+1);
    for (int i=n-1; i>=1; i--)
        r[i]=r[i+1]+max(0LL, a[i+1]-a[i]+1);
    for (int i=1; i<=n; i++)
        ans=min(ans, max(l[i], r[i]));
    cout << ans;
    return 0;
}

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