답안 #766449

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
766449	2023-06-25T16:29:30 Z	zsombor	경주 (Race) (IOI11_race)	C++17	100 / 100	359 ms	36212 KB

race

#include <iostream>
#include <vector>
#include <queue>
#include "race.h"
using namespace std;

int n, k, a, b, w, sz, c, ans = 1e9;
vector <vector <pair <int, int>>> g(2e5);
vector <bool> del(2e5, false);
vector <int> mn(1e6 + 1, 1e9);
queue <int> q;

int find_c(int x) {
	if (del[x]) return 0;
	del[x] = true;
	int mx = 0, sum = 1;
	for (auto& p : g[x]) {
		a = find_c(p.first);
		mx = max(mx, a);
		sum += a;
	}
	if (mx <= sz / 2 && sz - sum <= sz / 2) c = x;
	del[x] = false;
	return sum;
}

void dfs1(int x, int d, int wd) {
	if (del[x] || wd > k) return;
	del[x] = true;
	ans = min(ans, d + mn[k - wd]);
	for (auto& p : g[x]) dfs1(p.first, d + 1, wd + p.second);
	del[x] = false;
}

void dfs2(int x, int d, int wd) {
	if (del[x] || wd > k) return;
	del[x] = true;
	mn[wd] = min(mn[wd], d);
	q.push(wd);
	for (auto& p : g[x]) dfs2(p.first, d + 1, wd + p.second);
	del[x] = false;
}

void solve(int x) {
	if (del[x]) return;
	sz = find_c(x);
	find_c(x);
	del[c] = true;
	for (auto& p : g[c]) {
		dfs1(p.first, 1, p.second);
		dfs2(p.first, 1, p.second);
	}
	while (q.size()) { mn[q.front()] = 1e9; q.pop(); }
	for (auto& p : g[c]) solve(p.first);
}

int best_path(int N, int K, int H[][2], int L[]) {
	n = N; k = K;
	for (int i = 0; i < n - 1; i++) {
		a = H[i][0];
		b = H[i][1];
		w = L[i];
		g[a].push_back({ b,w });
		g[b].push_back({ a,w });
	}
	mn[0] = 0;
	solve(0);
	return (ans < 1e9 ? ans : -1);
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	8916 KB	Output is correct
2	Correct	4 ms	8916 KB	Output is correct
3	Correct	5 ms	8956 KB	Output is correct
4	Correct	4 ms	8960 KB	Output is correct
5	Correct	4 ms	8916 KB	Output is correct
6	Correct	4 ms	8916 KB	Output is correct
7	Correct	4 ms	8916 KB	Output is correct
8	Correct	5 ms	8904 KB	Output is correct
9	Correct	4 ms	8916 KB	Output is correct
10	Correct	4 ms	8960 KB	Output is correct
11	Correct	4 ms	8952 KB	Output is correct
12	Correct	4 ms	8916 KB	Output is correct
13	Correct	5 ms	8916 KB	Output is correct
14	Correct	4 ms	8956 KB	Output is correct
15	Correct	5 ms	8952 KB	Output is correct
16	Correct	4 ms	8852 KB	Output is correct
17	Correct	4 ms	8916 KB	Output is correct
18	Correct	4 ms	8916 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	8916 KB	Output is correct
2	Correct	4 ms	8916 KB	Output is correct
3	Correct	5 ms	8956 KB	Output is correct
4	Correct	4 ms	8960 KB	Output is correct
5	Correct	4 ms	8916 KB	Output is correct
6	Correct	4 ms	8916 KB	Output is correct
7	Correct	4 ms	8916 KB	Output is correct
8	Correct	5 ms	8904 KB	Output is correct
9	Correct	4 ms	8916 KB	Output is correct
10	Correct	4 ms	8960 KB	Output is correct
11	Correct	4 ms	8952 KB	Output is correct
12	Correct	4 ms	8916 KB	Output is correct
13	Correct	5 ms	8916 KB	Output is correct
14	Correct	4 ms	8956 KB	Output is correct
15	Correct	5 ms	8952 KB	Output is correct
16	Correct	4 ms	8852 KB	Output is correct
17	Correct	4 ms	8916 KB	Output is correct
18	Correct	4 ms	8916 KB	Output is correct
19	Correct	4 ms	8916 KB	Output is correct
20	Correct	5 ms	8952 KB	Output is correct
21	Correct	5 ms	8916 KB	Output is correct
22	Correct	5 ms	8916 KB	Output is correct
23	Correct	5 ms	8916 KB	Output is correct
24	Correct	5 ms	8916 KB	Output is correct
25	Correct	5 ms	9028 KB	Output is correct
26	Correct	5 ms	8916 KB	Output is correct
27	Correct	5 ms	8908 KB	Output is correct
28	Correct	5 ms	8964 KB	Output is correct
29	Correct	5 ms	8964 KB	Output is correct
30	Correct	5 ms	8916 KB	Output is correct
31	Correct	5 ms	8964 KB	Output is correct
32	Correct	5 ms	8916 KB	Output is correct
33	Correct	5 ms	8916 KB	Output is correct
34	Correct	6 ms	8972 KB	Output is correct
35	Correct	5 ms	8916 KB	Output is correct
36	Correct	5 ms	8968 KB	Output is correct
37	Correct	5 ms	8964 KB	Output is correct
38	Correct	5 ms	8916 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	8916 KB	Output is correct
2	Correct	4 ms	8916 KB	Output is correct
3	Correct	5 ms	8956 KB	Output is correct
4	Correct	4 ms	8960 KB	Output is correct
5	Correct	4 ms	8916 KB	Output is correct
6	Correct	4 ms	8916 KB	Output is correct
7	Correct	4 ms	8916 KB	Output is correct
8	Correct	5 ms	8904 KB	Output is correct
9	Correct	4 ms	8916 KB	Output is correct
10	Correct	4 ms	8960 KB	Output is correct
11	Correct	4 ms	8952 KB	Output is correct
12	Correct	4 ms	8916 KB	Output is correct
13	Correct	5 ms	8916 KB	Output is correct
14	Correct	4 ms	8956 KB	Output is correct
15	Correct	5 ms	8952 KB	Output is correct
16	Correct	4 ms	8852 KB	Output is correct
17	Correct	4 ms	8916 KB	Output is correct
18	Correct	4 ms	8916 KB	Output is correct
19	Correct	115 ms	15100 KB	Output is correct
20	Correct	112 ms	15156 KB	Output is correct
21	Correct	127 ms	15300 KB	Output is correct
22	Correct	107 ms	15492 KB	Output is correct
23	Correct	96 ms	15468 KB	Output is correct
24	Correct	52 ms	15356 KB	Output is correct
25	Correct	112 ms	18728 KB	Output is correct
26	Correct	102 ms	22784 KB	Output is correct
27	Correct	126 ms	21756 KB	Output is correct
28	Correct	242 ms	36212 KB	Output is correct
29	Correct	244 ms	35068 KB	Output is correct
30	Correct	127 ms	21704 KB	Output is correct
31	Correct	161 ms	21788 KB	Output is correct
32	Correct	147 ms	21888 KB	Output is correct
33	Correct	206 ms	20640 KB	Output is correct
34	Correct	158 ms	21476 KB	Output is correct

Subtask #4
57.0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	8916 KB	Output is correct
2	Correct	4 ms	8916 KB	Output is correct
3	Correct	5 ms	8956 KB	Output is correct
4	Correct	4 ms	8960 KB	Output is correct
5	Correct	4 ms	8916 KB	Output is correct
6	Correct	4 ms	8916 KB	Output is correct
7	Correct	4 ms	8916 KB	Output is correct
8	Correct	5 ms	8904 KB	Output is correct
9	Correct	4 ms	8916 KB	Output is correct
10	Correct	4 ms	8960 KB	Output is correct
11	Correct	4 ms	8952 KB	Output is correct
12	Correct	4 ms	8916 KB	Output is correct
13	Correct	5 ms	8916 KB	Output is correct
14	Correct	4 ms	8956 KB	Output is correct
15	Correct	5 ms	8952 KB	Output is correct
16	Correct	4 ms	8852 KB	Output is correct
17	Correct	4 ms	8916 KB	Output is correct
18	Correct	4 ms	8916 KB	Output is correct
19	Correct	4 ms	8916 KB	Output is correct
20	Correct	5 ms	8952 KB	Output is correct
21	Correct	5 ms	8916 KB	Output is correct
22	Correct	5 ms	8916 KB	Output is correct
23	Correct	5 ms	8916 KB	Output is correct
24	Correct	5 ms	8916 KB	Output is correct
25	Correct	5 ms	9028 KB	Output is correct
26	Correct	5 ms	8916 KB	Output is correct
27	Correct	5 ms	8908 KB	Output is correct
28	Correct	5 ms	8964 KB	Output is correct
29	Correct	5 ms	8964 KB	Output is correct
30	Correct	5 ms	8916 KB	Output is correct
31	Correct	5 ms	8964 KB	Output is correct
32	Correct	5 ms	8916 KB	Output is correct
33	Correct	5 ms	8916 KB	Output is correct
34	Correct	6 ms	8972 KB	Output is correct
35	Correct	5 ms	8916 KB	Output is correct
36	Correct	5 ms	8968 KB	Output is correct
37	Correct	5 ms	8964 KB	Output is correct
38	Correct	5 ms	8916 KB	Output is correct
39	Correct	115 ms	15100 KB	Output is correct
40	Correct	112 ms	15156 KB	Output is correct
41	Correct	127 ms	15300 KB	Output is correct
42	Correct	107 ms	15492 KB	Output is correct
43	Correct	96 ms	15468 KB	Output is correct
44	Correct	52 ms	15356 KB	Output is correct
45	Correct	112 ms	18728 KB	Output is correct
46	Correct	102 ms	22784 KB	Output is correct
47	Correct	126 ms	21756 KB	Output is correct
48	Correct	242 ms	36212 KB	Output is correct
49	Correct	244 ms	35068 KB	Output is correct
50	Correct	127 ms	21704 KB	Output is correct
51	Correct	161 ms	21788 KB	Output is correct
52	Correct	147 ms	21888 KB	Output is correct
53	Correct	206 ms	20640 KB	Output is correct
54	Correct	158 ms	21476 KB	Output is correct
55	Correct	12 ms	9608 KB	Output is correct
56	Correct	14 ms	9480 KB	Output is correct
57	Correct	84 ms	15700 KB	Output is correct
58	Correct	34 ms	15480 KB	Output is correct
59	Correct	99 ms	22820 KB	Output is correct
60	Correct	359 ms	36124 KB	Output is correct
61	Correct	155 ms	21972 KB	Output is correct
62	Correct	163 ms	22716 KB	Output is correct
63	Correct	185 ms	22676 KB	Output is correct
64	Correct	359 ms	22884 KB	Output is correct
65	Correct	219 ms	22548 KB	Output is correct
66	Correct	298 ms	32556 KB	Output is correct
67	Correct	80 ms	23300 KB	Output is correct
68	Correct	197 ms	22972 KB	Output is correct
69	Correct	183 ms	23004 KB	Output is correct
70	Correct	165 ms	22348 KB	Output is correct

답안 #766449

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 12.0 / 12.0

Subtask #3 22.0 / 22.0

Subtask #4 57.0 / 57.0

Subtask #1
9.0 / 9.0

Subtask #2
12.0 / 12.0

Subtask #3
22.0 / 22.0

Subtask #4
57.0 / 57.0