Submission #1132087

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132087		lopkus	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	16 ms	5092 KiB

Main

#include <bits/stdc++.h>

#define int long long


using namespace std;

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> a(n + 1);
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    vector<int> pref(n + 1, 0);
    vector<int> suf(n + 1, 0);
    for(int i = 1; i <= n; i++) {
        pref[i] = pref[i - 1] + max(a[i - 1] - a[i] + 1, 0LL);
    }
    for(int i = n - 1; i >= 0; i--) {
        suf[i] = suf[i + 1] + max(a[i + 1] - a[i] + 1, 0LL);
    }
    int ans = 1e18;
    for(int i = 1; i <= n; i++) {
        ans = min(ans, max(pref[i], suf[i]));
    }
    cout << ans;
}

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