Submission #621503

#	Time	Username	Problem	Language	Result	Execution time	Memory
621503		elkernos	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	27 ms	6988 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define int long long

int32_t main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    vector<int> a(n + 1);
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    vector<int> one(n + 1), two(n + 2);
    for(int i = 2; i <= n; i++) {
        one[i] = one[i - 1] + max(a[i - 1] - a[i] + 1, 0LL);
    }
    for(int i = n - 1; i >= 1; i--) {
        two[i] = two[i + 1] + max(a[i + 1] - a[i] + 1, 0LL);
    }
    const int oo = 1e18;
    int ans = oo;
    for(int i = 1; i <= n; i++) {
        ans = min(ans, max(one[i], two[i]));
    }
    cout << ans << '\n';
}

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