Submission #756778

#	Time	Username	Problem	Language	Result	Execution time	Memory
756778		otarius	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	79 ms	5072 KiB

Main

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

#define int ll
#define ll long long
void solve() {
    int n;
    cin >> n;
    int arr[n + 1], ans = 1e18;
    for (int i = 1; i <= n; i++)
        cin >> arr[i];
    int pref[n + 1], suff[n + 1];
    pref[1] = 0; suff[n] = 0;
    for (int i = 2; i <= n; i++) {
        if (arr[i - 1] < arr[i])
            pref[i] = pref[i - 1];
        else pref[i] = pref[i - 1] + arr[i - 1] - arr[i] + 1;
    }
    for (int i = n - 1; i >= 1; i--) {
        if (arr[i] > arr[i + 1])
            suff[i] = suff[i + 1];
        else suff[i] = suff[i + 1] + arr[i + 1] - arr[i] + 1;
    } for (int i = 1; i <= n; i++) {
        ans = min(ans, max(pref[i], suff[i]));
    } cout << ans;
}
int32_t main() {
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
        cout << '\n';
    }
    return 0;
}

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