답안 #707950

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
707950	2023-03-10T15:00:03 Z	Dan4Life	구경하기 (JOI13_watching)	C++17	100 / 100	255 ms	16064 KB

watching

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
const int mxN = (int)2e3+10;
const int LINF = (int)1e9;
int n, p, q;
int a[mxN], P[mxN], Q[mxN], dp[mxN][mxN];
 
bool work(int w){
	for(int i=2,j=1,k=1; i <= n; i++){
		while(a[i]-a[j]+1>w) j++;
		while(a[i]-a[k]+1>2*w) k++;
		P[i]=j-1,Q[i]=k-1;
	}
	for(int i = 1; i <= n; i++){
		for(int j = 0; j <= q; j++){
			dp[i][j] = min(LINF, dp[P[i]][j]+1);
			if(j) dp[i][j] = min(dp[i][j], dp[Q[i]][j-1]);
		}
	}
	return dp[n][q]<=p;
}
 
int32_t main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> p >> q;
	for(int i = 1; i <= n; i++) cin >> a[i];
	sort(a+1,a+n+1);
	if(p+q>=n){cout<<1;return 0;}
	int l = 1, r = (int)1e9;
	while(l<r){
		int mid = (l+r)/2;
		if(work(mid)) r=mid;
		else l=mid+1;
	}
	cout << l;
}

Subtask #1

50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	724 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	0 ms	724 KB	Output is correct
8	Correct	1 ms	724 KB	Output is correct
9	Correct	1 ms	724 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	0 ms	724 KB	Output is correct
15	Correct	1 ms	724 KB	Output is correct

Subtask #2

50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	8276 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	6 ms	8404 KB	Output is correct
8	Correct	111 ms	14240 KB	Output is correct
9	Correct	22 ms	9300 KB	Output is correct
10	Correct	20 ms	8984 KB	Output is correct
11	Correct	255 ms	16064 KB	Output is correct
12	Correct	138 ms	16020 KB	Output is correct
13	Correct	6 ms	8404 KB	Output is correct
14	Correct	7 ms	8404 KB	Output is correct
15	Correct	7 ms	8404 KB	Output is correct