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Submission #547128

# Submission time Handle Problem Language Result Execution time Memory
547128 2022-04-09T16:23:46 Z Hanksburger Watching (JOI13_watching) C++17
100 / 100
 99 ms 14284 KB 
#include <bits/stdc++.h>
using namespace std;
int dp[2005][2005], a[2005];
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n, p, q, l=1, r=1e9;
	cin >> n >> p >> q;
	p=min(p, n);
	for (int i=1; i<=n; i++)
		cin >> a[i];
	sort(a+1, a+n+1);
	while (l<r)
	{
		int mid=(l+r)/2;
		for (int i=1; i<=n; i++)
		{
			int x=upper_bound(a+1, a+n+1, a[i]-mid)-a-1, y=upper_bound(a+1, a+n+1, a[i]-mid*2)-a-1;
			for (int j=0; j<=i; j++)
			{
				dp[i][j]=dp[y][j]+1;
				if (j)
					dp[i][j]=min(dp[i][j], dp[x][j-1]);
			}
		}
		if (dp[n][p]>q)
			l=mid+1;
		else
			r=mid;
	}
	cout << l;
	return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 708 KB Output is correct
9 Correct 1 ms 712 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 1 ms 724 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 14164 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Correct 95 ms 14164 KB Output is correct
4 Correct 92 ms 14164 KB Output is correct
5 Correct 90 ms 14152 KB Output is correct
6 Correct 96 ms 14284 KB Output is correct
7 Correct 93 ms 14152 KB Output is correct
8 Correct 94 ms 14156 KB Output is correct
9 Correct 95 ms 14164 KB Output is correct
10 Correct 94 ms 14164 KB Output is correct
11 Correct 94 ms 14284 KB Output is correct
12 Correct 95 ms 14164 KB Output is correct
13 Correct 94 ms 14128 KB Output is correct
14 Correct 94 ms 14164 KB Output is correct
15 Correct 94 ms 14164 KB Output is correct