제출 #769929

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
769929		Jomnoi	Bigger segments (IZhO19_segments)	C++17	13 / 100	2 ms	2388 KiB

segments

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

const int MAX_N = 3005;
const long long INF = 1e18 + 7;

long long A[MAX_N], dp[MAX_N][MAX_N];

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

    int N;
    cin >> N;

    for (int i = 1; i <= N; i++) {
        cin >> A[i];

        A[i] += A[i - 1];
    }

    int ans = 1;
    for (int i = 1; i <= N; i++) dp[i][0] = INF;
    for (int i = 1; i <= N; i++) dp[1][i] = A[i];
    for (int s = 2; s <= N; s++) {
        for (int i = 1; i <= N; i++) {
            dp[s][i] = INF;
            int l = 1, r = i, pos = -1;
            while (l <= r) {
                int mid = (l + r) / 2;

                if (dp[s - 1][mid - 1] == INF) l = mid + 1;
                else if (dp[s - 1][mid - 1] <= A[i] - A[mid - 1]) l = mid + 1, pos = mid;
                else r = mid - 1;
            }
            if (pos != -1) dp[s][i] = A[i] - A[pos - 1];
        }

        if (dp[s][N] == INF) break;
        ans = s;
    }
    cout << ans;
    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27