답안 #671502

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
671502	2022-12-13T06:08:12 Z	amunduzbaev	Sparklers (JOI17_sparklers)	C++17	50 / 100	45 ms	8268 KB

sparklers

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

#define ar array
typedef long long ll;
#define int ll

const int N = 1e3 + 5;
int x[N], dp[N][N];

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, k, T; cin >> n >> k >> T;
	for(int i=1;i<=n;i++){
		cin >> x[i];
	}
	
	x[n + 1] = x[n];
	
	auto check = [&](int s){
		int t = T * s * 2;
		memset(dp, 0, sizeof dp);
		dp[k][k] = 1;
		for(int d=0;d<n;d++){
			for(int l=1, r=1+d;l+d<=n;l++, r++){
				if(!dp[l][r]) continue;
				if(1 < l && (r - l + 1) * t >= x[r] - x[l - 1]){
					dp[l - 1][r] = 1;
				} 
				if(r < n && (r - l + 1) * t >= x[r + 1] - x[l]){
					dp[l][r + 1] = 1;
				}
			}
		}
		
		return dp[1][n];
	};
	
	int l = 0, r = x[n] / (T * 2) + 1;
	while(l < r){
		int m = (l + r) >> 1;
		if(check(m)) r = m;
		else l = m + 1;
	}
	
	cout<<l<<"\n";
}

Subtask #1

30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	8148 KB	Output is correct
2	Correct	12 ms	8148 KB	Output is correct
3	Correct	13 ms	8148 KB	Output is correct
4	Correct	14 ms	8148 KB	Output is correct
5	Correct	14 ms	8148 KB	Output is correct
6	Correct	16 ms	8148 KB	Output is correct
7	Correct	18 ms	8148 KB	Output is correct
8	Correct	13 ms	8232 KB	Output is correct
9	Correct	14 ms	8228 KB	Output is correct
10	Correct	16 ms	8228 KB	Output is correct
11	Correct	15 ms	8136 KB	Output is correct
12	Correct	12 ms	8148 KB	Output is correct
13	Correct	14 ms	8232 KB	Output is correct
14	Correct	16 ms	8228 KB	Output is correct
15	Correct	14 ms	8232 KB	Output is correct
16	Correct	14 ms	8148 KB	Output is correct
17	Correct	12 ms	8148 KB	Output is correct
18	Correct	13 ms	8148 KB	Output is correct
19	Correct	3 ms	8148 KB	Output is correct
20	Correct	21 ms	8136 KB	Output is correct
21	Correct	3 ms	8148 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	8148 KB	Output is correct
2	Correct	12 ms	8148 KB	Output is correct
3	Correct	13 ms	8148 KB	Output is correct
4	Correct	14 ms	8148 KB	Output is correct
5	Correct	14 ms	8148 KB	Output is correct
6	Correct	16 ms	8148 KB	Output is correct
7	Correct	18 ms	8148 KB	Output is correct
8	Correct	13 ms	8232 KB	Output is correct
9	Correct	14 ms	8228 KB	Output is correct
10	Correct	16 ms	8228 KB	Output is correct
11	Correct	15 ms	8136 KB	Output is correct
12	Correct	12 ms	8148 KB	Output is correct
13	Correct	14 ms	8232 KB	Output is correct
14	Correct	16 ms	8228 KB	Output is correct
15	Correct	14 ms	8232 KB	Output is correct
16	Correct	14 ms	8148 KB	Output is correct
17	Correct	12 ms	8148 KB	Output is correct
18	Correct	13 ms	8148 KB	Output is correct
19	Correct	3 ms	8148 KB	Output is correct
20	Correct	21 ms	8136 KB	Output is correct
21	Correct	3 ms	8148 KB	Output is correct
22	Correct	22 ms	8244 KB	Output is correct
23	Correct	19 ms	8148 KB	Output is correct
24	Correct	24 ms	8148 KB	Output is correct
25	Correct	35 ms	8268 KB	Output is correct
26	Correct	40 ms	8148 KB	Output is correct
27	Correct	39 ms	8148 KB	Output is correct
28	Correct	40 ms	8148 KB	Output is correct
29	Correct	37 ms	8148 KB	Output is correct
30	Correct	39 ms	8148 KB	Output is correct
31	Correct	39 ms	8148 KB	Output is correct
32	Correct	39 ms	8148 KB	Output is correct
33	Correct	44 ms	8232 KB	Output is correct
34	Correct	45 ms	8148 KB	Output is correct
35	Correct	42 ms	8228 KB	Output is correct
36	Correct	43 ms	8148 KB	Output is correct
37	Correct	32 ms	8168 KB	Output is correct
38	Correct	39 ms	8144 KB	Output is correct
39	Correct	39 ms	8228 KB	Output is correct
40	Correct	6 ms	8148 KB	Output is correct

Subtask #3

0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	8148 KB	Output is correct
2	Correct	12 ms	8148 KB	Output is correct
3	Correct	13 ms	8148 KB	Output is correct
4	Correct	14 ms	8148 KB	Output is correct
5	Correct	14 ms	8148 KB	Output is correct
6	Correct	16 ms	8148 KB	Output is correct
7	Correct	18 ms	8148 KB	Output is correct
8	Correct	13 ms	8232 KB	Output is correct
9	Correct	14 ms	8228 KB	Output is correct
10	Correct	16 ms	8228 KB	Output is correct
11	Correct	15 ms	8136 KB	Output is correct
12	Correct	12 ms	8148 KB	Output is correct
13	Correct	14 ms	8232 KB	Output is correct
14	Correct	16 ms	8228 KB	Output is correct
15	Correct	14 ms	8232 KB	Output is correct
16	Correct	14 ms	8148 KB	Output is correct
17	Correct	12 ms	8148 KB	Output is correct
18	Correct	13 ms	8148 KB	Output is correct
19	Correct	3 ms	8148 KB	Output is correct
20	Correct	21 ms	8136 KB	Output is correct
21	Correct	3 ms	8148 KB	Output is correct
22	Correct	22 ms	8244 KB	Output is correct
23	Correct	19 ms	8148 KB	Output is correct
24	Correct	24 ms	8148 KB	Output is correct
25	Correct	35 ms	8268 KB	Output is correct
26	Correct	40 ms	8148 KB	Output is correct
27	Correct	39 ms	8148 KB	Output is correct
28	Correct	40 ms	8148 KB	Output is correct
29	Correct	37 ms	8148 KB	Output is correct
30	Correct	39 ms	8148 KB	Output is correct
31	Correct	39 ms	8148 KB	Output is correct
32	Correct	39 ms	8148 KB	Output is correct
33	Correct	44 ms	8232 KB	Output is correct
34	Correct	45 ms	8148 KB	Output is correct
35	Correct	42 ms	8228 KB	Output is correct
36	Correct	43 ms	8148 KB	Output is correct
37	Correct	32 ms	8168 KB	Output is correct
38	Correct	39 ms	8144 KB	Output is correct
39	Correct	39 ms	8228 KB	Output is correct
40	Correct	6 ms	8148 KB	Output is correct
41	Runtime error	1 ms	508 KB	Execution killed with signal 11
42	Halted	0 ms	0 KB	-