Submission #657236

#	Time	Username	Problem	Language	Result	Execution time	Memory
657236		device	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	81 ms	6940 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n, ans = 1e18, a[200005], ps[200005], ss[200005];
int main() {
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 2; i <= n; i++) {
        ps[i] = ps[i-1] + max(a[i-1] - a[i] + 1, 0ll);
    }
    for (int i = n-1; i >= 1; i--) {
        ss[i] = ss[i+1] + max(a[i+1] - a[i] + 1, 0ll);
    }
    for (int i = 1; i <= n; i++) {
        ans = min(ans, max(ps[i], ss[i]));
    }
    cout << ans << '\n';
}

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