Submission #1021236

#	Time	Username	Problem	Language	Result	Execution time	Memory
1021236		aufan	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	26 ms	7004 KiB

Main

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

using namespace std;

const int inff = 1e18;

int32_t main()
{
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        
        int n;
        cin >> n;

        vector<int> a(n);
        for (int i = 0; i < n; i++) cin >> a[i];

        vector<int> p(n);
        for (int i = 1; i < n; i++) p[i] = max(p[i - 1], a[i - 1] + p[i - 1] + 1 - a[i]);

        vector<int> s(n);
        for (int i = n - 2; i >= 0; i--) s[i] = max(s[i + 1], a[i + 1] + s[i + 1] + 1 - a[i]);

        int ans = inff;
        for (int i = 0; i < n; i++) ans = min(ans, max(p[i], s[i]));

        cout << ans << '\n';
        
        return 0;
}

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