Submission #1281955

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281955		dhuyyyy	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	18 ms	5140 KiB

Main

#include<bits/stdc++.h>
#define fi first
#define se second
#define int long long
using namespace std;

using ll = long long;
using ii = pair<int, int>;
using aa = array<int,3>;

const int N = 5e5+5;

int n, ans = (int)1e18, timer, cur, pos, mx;

int a[N], pre[N], suf[N];

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
    }
    for (int i = 2; i <= n; i++){
        pre[i] = pre[i-1];
        if (a[i-1] >= a[i]) pre[i] += (a[i-1] + 1 - a[i]);
    }
    for (int i = n - 1; i >= 1; i--){
        suf[i] = suf[i + 1];
        if (a[i + 1] >= a[i]) suf[i] += (a[i + 1] + 1 - a[i]);
    }
    for (int i = 1; i <= n; i++) ans = min(ans,max(pre[i],suf[i]));
    cout << ans;
    return 0;
}

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