답안 #256830

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
256830	2020-08-03T09:09:10 Z	islingr	구경하기 (JOI13_watching)	C++17	100 / 100	178 ms	16536 KB

watching

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

const int N = 1 << 11;
int n, P, Q, a[N], dp[N][N];

bool f(int w) {
	for (int i = 1; i <= n; ++i) {
		int j = i, k = i;
		while (j && a[i] - a[j] < w) --j;
		while (k && a[i] - a[k] < 2 * w) --k;
		dp[i][0] = 1 + dp[k][0];
		for (int p = 1; p <= P; ++p) dp[i][p] = min(dp[j][p - 1], 1 + dp[k][p]);
	}
	return dp[n][P] <= Q;
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	cin >> n >> P >> Q;
	for (int i = 1; i <= n; ++i) cin >> a[i];
	if (n <= P) return cout << 1, 0;
	sort(a + 1, a + n + 1);
	int l = 0, r = a[n] - a[1] + 1;
	while (r - l > 1) {
		int m = l + (r - l + 1) / 2;
		(f(m) ? r : l) = m;
	}
	cout << r;
}

Subtask #1

50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	768 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	0 ms	384 KB	Output is correct
5	Correct	1 ms	768 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	1 ms	768 KB	Output is correct
8	Correct	1 ms	768 KB	Output is correct
9	Correct	1 ms	768 KB	Output is correct
10	Correct	1 ms	768 KB	Output is correct
11	Correct	1 ms	768 KB	Output is correct
12	Correct	1 ms	768 KB	Output is correct
13	Correct	1 ms	768 KB	Output is correct
14	Correct	1 ms	768 KB	Output is correct
15	Correct	1 ms	768 KB	Output is correct

Subtask #2

50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	77 ms	8448 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	166 ms	16384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	36 ms	8448 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	30 ms	8448 KB	Output is correct
8	Correct	30 ms	8448 KB	Output is correct
9	Correct	100 ms	16536 KB	Output is correct
10	Correct	178 ms	16376 KB	Output is correct
11	Correct	29 ms	8448 KB	Output is correct
12	Correct	105 ms	16384 KB	Output is correct
13	Correct	17 ms	8448 KB	Output is correct
14	Correct	19 ms	8448 KB	Output is correct
15	Correct	20 ms	8448 KB	Output is correct