제출 #462099

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
462099	2021-08-10 07:52:59	nickyrio	Watching (JOI13_watching)	C++17	100 / 100	347 ms	16196 KiB

watching

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#include <bits/stdc++.h>
using namespace std;
const int N = 2020;
int n, p, q;
long long a[N];
int dp[N][N];
void Min(int &a, int b) { a = (a > b ? b : a); }
bool Check(long long w) {
    for (int i = 0; i <= n; ++i) {
        for (int j = 0; j <= p; ++j) dp[i][j] = 1e9;
    }
    dp[0][0] = 0;
    for (int i = 0; i < n; ++i) {
        int nxt_p = lower_bound(a, a + n, a[i] + w) - a;
        int nxt_q = lower_bound(a, a + n, a[i] + w + w) - a;
        for (int np = 0; np <= p; ++np) {
            Min(dp[nxt_p][np + 1], dp[i][np]);
            Min(dp[nxt_q][np], dp[i][np] + 1);
        }
    }
    for (int i = 0; i <= p; ++i) if (dp[n][i] <= q) return true;
    // return dp[n][p] <= q;
    return false;
}
int main() {
    ios::sync_with_stdio(false); cin.tie(NULL);
    cin >> n >> p >> q;
 
 
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• Subtask 1: 50 / 50
• Subtask 2: 50 / 50