Submission #867847

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
867847	2023-10-29 15:09:25	hungnt	Watching (JOI13_watching)	C++14	100 / 100	151 ms	16176 KiB

watching

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#include <bits/stdc++.h>
using namespace std;
const int N = 2002;
int n, a, b;
int p[N], dp[N][N];
bool check(int w)
{
    memset(dp, 0x3f, sizeof dp);
    dp[0][0] = 0;
    for(int i = 1; i <= n; i++)
    {
        int j1 = upper_bound(p + 1, p + n + 1, p[i] - w) - p - 1;
        int j2 = upper_bound(p + 1, p + n + 1, p[i] - 2 * w) - p - 1;
        for(int k = 0; k <= a; k++)
        {
            if(k) dp[i][k] = min(dp[i][k], dp[j1][k - 1]);
            dp[i][k] = min(dp[i][k], dp[j2][k] + 1);
        }
    }
    for(int i = 0; i <= a; i++)
        if(dp[n][i] <= b) return 1;
    return 0;
}
int main()
{
 
 
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• Subtask 1: 50 / 50
• Subtask 2: 50 / 50