Submission #1220957

#	Time	Username	Problem	Language	Result	Execution time	Memory
1220957		toast12	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	50 ms	5056 KiB

Main

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
    int n;
    cin >> n;
    vector<ll> a(n+2);
    for (int i = 1; i <= n; i++) cin >> a[i];
    vector<ll> inc(n+2), dec(n+2);
    for (int i = 2; i <= n; i++) inc[i] = inc[i-1]+ max(0ll, a[i-1]+1-a[i]);
    for (int i = n-1; i >= 1; i--) dec[i] = dec[i+1] + max(0ll, a[i+1]+1-a[i]);
    ll ans = 1e18;
    for (int i = 1; i <= n; i++) ans = min(ans, max(inc[i], dec[i]));
    cout << ans << '\n';
    return 0;
}

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