Submission #1092255

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092255		ortsac	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	62 ms	7004 KiB

Main

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

#define int long long

int32_t main() {
    int n;
    cin >> n;
    vector<int> v(n + 2);
    for (int i = 1; i <= n; i++) {
        cin >> v[i];
    }
    vector<int> pf(n + 1), sf(n + 2);
    for (int i = 1; i <= n; i++) {
        int k = max(0LL, (v[i - 1] - v[i] + 1));
        pf[i] = (pf[i - 1] + k);
    }
    for (int i = n; i >= 1; i--) {
        int k = max(0LL, (v[i + 1] - v[i] + 1));
        sf[i] = (sf[i + 1] + k);
    }
    int ans = 0x3f3f3f3f3f3f3f3f;
    for (int i = 1; i <= n; i++) {
        // i is k
        int x = max(pf[i - 1], sf[i + 1]);
        int y = max(v[i - 1], v[i + 1]);
        int z = max(0LL, y - v[i] + 1);
        //cout << x << " " << y << " " << z << " " << x+z << "\n";
        ans = min(ans, x + z);
    }
    cout << ans << "\n";
}

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