Submission #55330

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
55330	2018-07-07T03:23:24 Z	ksun48	Sparklers (JOI17_sparklers)	C++14	50 / 100	23 ms	5100 KB

sparklers

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

int main(){
	cin.sync_with_stdio(0); cin.tie(0);
	LL n, k, t;
	cin >> n >> k >> t;
	k--;
	vector<LL> x(n);
	for(int i = 0; i < n; i++){
		cin >> x[i];
	}		
	LL s = -1;
	LL e = 1000000000;
	LL dp[n][n];
	while(s + 1 < e){
		LL m = (s + e) / 2;
		vector<LL> y = x;
		for(LL i = 0; i < n; i++){
			y[i] -= m * t * 2 * i;
		}
		for(LL i = k; i >= 0; i--){
			for(LL j = k; j < n; j++){
				dp[i][j] = 0;
				if(y[j] <= y[i]){
					if((i == k && j == k) || (i < k && dp[i+1][j]) || (j > k && dp[i][j-1])){
						dp[i][j] = 1;
					}
				}
			}
		}
		if(dp[0][n-1]){
			e = m;
		} else {
			s = m;
		}
	}
	cout << e << '\n';
}

Subtask #1

30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	3 ms	508 KB	Output is correct
5	Correct	3 ms	508 KB	Output is correct
6	Correct	2 ms	508 KB	Output is correct
7	Correct	3 ms	508 KB	Output is correct
8	Correct	3 ms	636 KB	Output is correct
9	Correct	3 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	692 KB	Output is correct
12	Correct	2 ms	692 KB	Output is correct
13	Correct	2 ms	692 KB	Output is correct
14	Correct	2 ms	692 KB	Output is correct
15	Correct	2 ms	692 KB	Output is correct
16	Correct	3 ms	692 KB	Output is correct
17	Correct	2 ms	692 KB	Output is correct
18	Correct	2 ms	692 KB	Output is correct
19	Correct	4 ms	692 KB	Output is correct
20	Correct	3 ms	692 KB	Output is correct
21	Correct	2 ms	692 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	3 ms	508 KB	Output is correct
5	Correct	3 ms	508 KB	Output is correct
6	Correct	2 ms	508 KB	Output is correct
7	Correct	3 ms	508 KB	Output is correct
8	Correct	3 ms	636 KB	Output is correct
9	Correct	3 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	692 KB	Output is correct
12	Correct	2 ms	692 KB	Output is correct
13	Correct	2 ms	692 KB	Output is correct
14	Correct	2 ms	692 KB	Output is correct
15	Correct	2 ms	692 KB	Output is correct
16	Correct	3 ms	692 KB	Output is correct
17	Correct	2 ms	692 KB	Output is correct
18	Correct	2 ms	692 KB	Output is correct
19	Correct	4 ms	692 KB	Output is correct
20	Correct	3 ms	692 KB	Output is correct
21	Correct	2 ms	692 KB	Output is correct
22	Correct	16 ms	2152 KB	Output is correct
23	Correct	7 ms	2152 KB	Output is correct
24	Correct	5 ms	2152 KB	Output is correct
25	Correct	4 ms	2152 KB	Output is correct
26	Correct	13 ms	2152 KB	Output is correct
27	Correct	19 ms	2152 KB	Output is correct
28	Correct	23 ms	4840 KB	Output is correct
29	Correct	21 ms	4972 KB	Output is correct
30	Correct	19 ms	4972 KB	Output is correct
31	Correct	17 ms	5100 KB	Output is correct
32	Correct	22 ms	5100 KB	Output is correct
33	Correct	21 ms	5100 KB	Output is correct
34	Correct	13 ms	5100 KB	Output is correct
35	Correct	19 ms	5100 KB	Output is correct
36	Correct	8 ms	5100 KB	Output is correct
37	Correct	8 ms	5100 KB	Output is correct
38	Correct	22 ms	5100 KB	Output is correct
39	Correct	10 ms	5100 KB	Output is correct
40	Correct	18 ms	5100 KB	Output is correct

Subtask #3

0 / 50.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	3 ms	508 KB	Output is correct
5	Correct	3 ms	508 KB	Output is correct
6	Correct	2 ms	508 KB	Output is correct
7	Correct	3 ms	508 KB	Output is correct
8	Correct	3 ms	636 KB	Output is correct
9	Correct	3 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	692 KB	Output is correct
12	Correct	2 ms	692 KB	Output is correct
13	Correct	2 ms	692 KB	Output is correct
14	Correct	2 ms	692 KB	Output is correct
15	Correct	2 ms	692 KB	Output is correct
16	Correct	3 ms	692 KB	Output is correct
17	Correct	2 ms	692 KB	Output is correct
18	Correct	2 ms	692 KB	Output is correct
19	Correct	4 ms	692 KB	Output is correct
20	Correct	3 ms	692 KB	Output is correct
21	Correct	2 ms	692 KB	Output is correct
22	Correct	16 ms	2152 KB	Output is correct
23	Correct	7 ms	2152 KB	Output is correct
24	Correct	5 ms	2152 KB	Output is correct
25	Correct	4 ms	2152 KB	Output is correct
26	Correct	13 ms	2152 KB	Output is correct
27	Correct	19 ms	2152 KB	Output is correct
28	Correct	23 ms	4840 KB	Output is correct
29	Correct	21 ms	4972 KB	Output is correct
30	Correct	19 ms	4972 KB	Output is correct
31	Correct	17 ms	5100 KB	Output is correct
32	Correct	22 ms	5100 KB	Output is correct
33	Correct	21 ms	5100 KB	Output is correct
34	Correct	13 ms	5100 KB	Output is correct
35	Correct	19 ms	5100 KB	Output is correct
36	Correct	8 ms	5100 KB	Output is correct
37	Correct	8 ms	5100 KB	Output is correct
38	Correct	22 ms	5100 KB	Output is correct
39	Correct	10 ms	5100 KB	Output is correct
40	Correct	18 ms	5100 KB	Output is correct
41	Runtime error	17 ms	5100 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
42	Halted	0 ms	0 KB	-