Submission #1311410

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311410		madamadam3	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	0 / 100	1095 ms	572 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0)->sync_with_stdio(0);

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

    vector<int> f(n), r(n);
    f[0] = r[n-1] = 0;

    for (int i = 1; i < n; i++) {
        int dx = (a[i-1] + f[i-1] + 1) - (a[i]);
        f[i] = max(0, dx);

        int dy = (a[n-i] + r[n-i] + 1) - (a[n-i-1]);
        r[n-i-1] = max(0, dy);
    }

    vector<int> DP1(n+1, 0);
    for (int i = 0; i <= n; i++) {
        vector<int> f2(n); for (int j = 0; j < n; j++) f2[i] = (j < i ? f[i] : r[i]);
        int t = 0, s = accumulate(f2.begin(), f2.end(), 0);

        while (s > 0) {
            int best = -1, l = -1, r = -1, prev = -1;
            for (int j = 0; j <= n; j++) {
                if (f2[j] != 0 && j != n) continue;
                if (j-prev > best) {
                    best = j-prev; l = prev; r = j;
                }

                prev = j;
            }

            for (int j = l+1; j < r; j++) {
                s--; f2[j]--;
            }
            t++;
        }

        DP1[i] = t;
    }

    cout << *max_element(DP1.begin(), DP1.end());
    return 0;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60