Submission #1265870

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265870		canhnam357	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	15 ms	4360 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> a(n);
    for (int &i : a) cin >> i;
    for (int i = 1; i < n; i++) {
        a[i - 1] = a[i] - a[i - 1];
    }   
    a.pop_back();
    n--;
    vector<long long> l(n), r(n);
    for (int i = 0; i < n; i++) {
        l[i] = max(0, -a[i] + 1);
        if (i) l[i] += l[i - 1];
    }
    for (int i = n - 1; i >= 0; i--) {
        r[i] = max(0, a[i] + 1);
        if (i + 1 < n) r[i] += r[i + 1];
    }
    long long ans = min(r[0], l[n - 1]);
    for (int i = 0; i + 1 < n; i++) {
        ans = min(ans, max(l[i], r[i + 1]));
    }
    cout << ans;
    return 0;
}

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