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답안 #551201

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
551201 2022-04-20T05:21:23 Z Sohsoh84 경주 (Race) (IOI11_race) C++17
100 / 100
 920 ms 63352 KB 
#include "race.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define X			first
#define Y			second
#define sep			' '
#define debug(x)		cerr << #x << ": " << x << endl;

const ll INF = 1e9;
const ll MAXN = 1e6 + 10;

int n, k, ans, sz[MAXN];
vector<pll> adj[MAXN];
bool B[MAXN];
map<ll, int> mp;
vector<pll> vec;

int sub_sz(int v, int p) {
	sz[v] = 1;
	for (auto [u, w] : adj[v])
		if (!B[u] && u != p)
			sz[v] += sub_sz(u, v);
	return sz[v];
}

int centroid(int v, int p, int n) {
	for (auto [u, w] : adj[v])
		if (!B[u] && u != p && sz[u] * 2 > n)
			return centroid(u, v, n);
	return v;
}

void dfs(int v, int p, ll w, int l) {
	vec.push_back({w, l});
	auto it = mp.find(k - w);
	if (it != mp.end()) ans = min(ans, l + it -> Y);

	for (auto [u, e_w] : adj[v])
		if (u != p && !B[u])
			dfs(u, v, w + e_w, l + 1);
}

void solve(int v) { 
	B[v = centroid(v, 0, sub_sz(v, 0))] = true;
	mp.clear();
	mp[0] = 0;

	for (auto [u, w] : adj[v]) {
		if (!B[u]) {
			dfs(u, v, w, 1);
			for (pll e : vec) {
				auto it = mp.find(e.X);
				if (it == mp.end() || it -> Y > e.Y)
					mp[e.X] = e.Y;
			}

			vec.clear();
		}
	}

	for (auto [u, w] : adj[v])
		if (!B[u])
			solve(u);
}

int best_path(int N, int K, int H[][2], int L[]) {
	n = N, k = K;
	for (int i = 0; i < n - 1; i++) {
		int u = H[i][0], v = H[i][1], l = L[i];
		u++, v++;
		adj[u].push_back({v, l});
		adj[v].push_back({u, l});
	}

	ans = INF;
	solve(1);
	return (ans == INF ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23776 KB Output is correct
4 Correct 14 ms 23892 KB Output is correct
5 Correct 13 ms 23800 KB Output is correct
6 Correct 14 ms 23808 KB Output is correct
7 Correct 14 ms 23808 KB Output is correct
8 Correct 17 ms 23728 KB Output is correct
9 Correct 15 ms 23816 KB Output is correct
10 Correct 15 ms 23824 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23820 KB Output is correct
13 Correct 15 ms 23808 KB Output is correct
14 Correct 14 ms 23764 KB Output is correct
15 Correct 16 ms 23764 KB Output is correct
16 Correct 15 ms 23748 KB Output is correct
17 Correct 12 ms 23744 KB Output is correct
18 Correct 16 ms 23740 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23776 KB Output is correct
4 Correct 14 ms 23892 KB Output is correct
5 Correct 13 ms 23800 KB Output is correct
6 Correct 14 ms 23808 KB Output is correct
7 Correct 14 ms 23808 KB Output is correct
8 Correct 17 ms 23728 KB Output is correct
9 Correct 15 ms 23816 KB Output is correct
10 Correct 15 ms 23824 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23820 KB Output is correct
13 Correct 15 ms 23808 KB Output is correct
14 Correct 14 ms 23764 KB Output is correct
15 Correct 16 ms 23764 KB Output is correct
16 Correct 15 ms 23748 KB Output is correct
17 Correct 12 ms 23744 KB Output is correct
18 Correct 16 ms 23740 KB Output is correct
19 Correct 16 ms 23856 KB Output is correct
20 Correct 15 ms 23764 KB Output is correct
21 Correct 14 ms 23892 KB Output is correct
22 Correct 15 ms 23892 KB Output is correct
23 Correct 16 ms 23912 KB Output is correct
24 Correct 15 ms 23908 KB Output is correct
25 Correct 15 ms 23968 KB Output is correct
26 Correct 14 ms 23944 KB Output is correct
27 Correct 14 ms 23816 KB Output is correct
28 Correct 14 ms 23928 KB Output is correct
29 Correct 14 ms 23868 KB Output is correct
30 Correct 14 ms 23892 KB Output is correct
31 Correct 14 ms 23856 KB Output is correct
32 Correct 14 ms 23956 KB Output is correct
33 Correct 15 ms 23892 KB Output is correct
34 Correct 15 ms 23892 KB Output is correct
35 Correct 18 ms 24012 KB Output is correct
36 Correct 19 ms 23892 KB Output is correct
37 Correct 15 ms 23892 KB Output is correct
38 Correct 14 ms 23892 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23776 KB Output is correct
4 Correct 14 ms 23892 KB Output is correct
5 Correct 13 ms 23800 KB Output is correct
6 Correct 14 ms 23808 KB Output is correct
7 Correct 14 ms 23808 KB Output is correct
8 Correct 17 ms 23728 KB Output is correct
9 Correct 15 ms 23816 KB Output is correct
10 Correct 15 ms 23824 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23820 KB Output is correct
13 Correct 15 ms 23808 KB Output is correct
14 Correct 14 ms 23764 KB Output is correct
15 Correct 16 ms 23764 KB Output is correct
16 Correct 15 ms 23748 KB Output is correct
17 Correct 12 ms 23744 KB Output is correct
18 Correct 16 ms 23740 KB Output is correct
19 Correct 202 ms 31724 KB Output is correct
20 Correct 225 ms 31804 KB Output is correct
21 Correct 211 ms 31748 KB Output is correct
22 Correct 184 ms 31856 KB Output is correct
23 Correct 249 ms 32108 KB Output is correct
24 Correct 110 ms 30800 KB Output is correct
25 Correct 185 ms 36140 KB Output is correct
26 Correct 111 ms 37656 KB Output is correct
27 Correct 260 ms 38540 KB Output is correct
28 Correct 884 ms 63352 KB Output is correct
29 Correct 893 ms 62408 KB Output is correct
30 Correct 294 ms 38416 KB Output is correct
31 Correct 277 ms 38512 KB Output is correct
32 Correct 379 ms 38492 KB Output is correct
33 Correct 391 ms 39036 KB Output is correct
34 Correct 834 ms 50716 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23776 KB Output is correct
4 Correct 14 ms 23892 KB Output is correct
5 Correct 13 ms 23800 KB Output is correct
6 Correct 14 ms 23808 KB Output is correct
7 Correct 14 ms 23808 KB Output is correct
8 Correct 17 ms 23728 KB Output is correct
9 Correct 15 ms 23816 KB Output is correct
10 Correct 15 ms 23824 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23820 KB Output is correct
13 Correct 15 ms 23808 KB Output is correct
14 Correct 14 ms 23764 KB Output is correct
15 Correct 16 ms 23764 KB Output is correct
16 Correct 15 ms 23748 KB Output is correct
17 Correct 12 ms 23744 KB Output is correct
18 Correct 16 ms 23740 KB Output is correct
19 Correct 16 ms 23856 KB Output is correct
20 Correct 15 ms 23764 KB Output is correct
21 Correct 14 ms 23892 KB Output is correct
22 Correct 15 ms 23892 KB Output is correct
23 Correct 16 ms 23912 KB Output is correct
24 Correct 15 ms 23908 KB Output is correct
25 Correct 15 ms 23968 KB Output is correct
26 Correct 14 ms 23944 KB Output is correct
27 Correct 14 ms 23816 KB Output is correct
28 Correct 14 ms 23928 KB Output is correct
29 Correct 14 ms 23868 KB Output is correct
30 Correct 14 ms 23892 KB Output is correct
31 Correct 14 ms 23856 KB Output is correct
32 Correct 14 ms 23956 KB Output is correct
33 Correct 15 ms 23892 KB Output is correct
34 Correct 15 ms 23892 KB Output is correct
35 Correct 18 ms 24012 KB Output is correct
36 Correct 19 ms 23892 KB Output is correct
37 Correct 15 ms 23892 KB Output is correct
38 Correct 14 ms 23892 KB Output is correct
39 Correct 202 ms 31724 KB Output is correct
40 Correct 225 ms 31804 KB Output is correct
41 Correct 211 ms 31748 KB Output is correct
42 Correct 184 ms 31856 KB Output is correct
43 Correct 249 ms 32108 KB Output is correct
44 Correct 110 ms 30800 KB Output is correct
45 Correct 185 ms 36140 KB Output is correct
46 Correct 111 ms 37656 KB Output is correct
47 Correct 260 ms 38540 KB Output is correct
48 Correct 884 ms 63352 KB Output is correct
49 Correct 893 ms 62408 KB Output is correct
50 Correct 294 ms 38416 KB Output is correct
51 Correct 277 ms 38512 KB Output is correct
52 Correct 379 ms 38492 KB Output is correct
53 Correct 391 ms 39036 KB Output is correct
54 Correct 834 ms 50716 KB Output is correct
55 Correct 38 ms 24916 KB Output is correct
56 Correct 28 ms 24960 KB Output is correct
57 Correct 129 ms 32224 KB Output is correct
58 Correct 52 ms 30304 KB Output is correct
59 Correct 272 ms 42096 KB Output is correct
60 Correct 898 ms 61808 KB Output is correct
61 Correct 328 ms 40096 KB Output is correct
62 Correct 306 ms 38504 KB Output is correct
63 Correct 331 ms 38356 KB Output is correct
64 Correct 920 ms 45208 KB Output is correct
65 Correct 900 ms 51508 KB Output is correct
66 Correct 901 ms 60340 KB Output is correct
67 Correct 143 ms 36912 KB Output is correct
68 Correct 511 ms 49824 KB Output is correct
69 Correct 485 ms 49784 KB Output is correct
70 Correct 448 ms 48720 KB Output is correct