답안 #957828

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
957828 2024-04-04T11:19:29 Z Trisanu_Das 경주 (Race) (IOI11_race) C++17
100 / 100
406 ms 108624 KB
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pb push_back
#define ff first
#define ss second
 
vector<pair<ll, ll> > adj[200005];
map<ll, ll> sum_to_dist[200005];
ll dist[200005], sum[200005];
int N, K;
ll ans;
 
void dfs(int u, int p, ll s, int d) {
	sum_to_dist[u][s] = d;
	sum[u] = s;
	dist[u] = d;
	for (auto v : adj[u]) if (p != v.ff) dfs(v.ff, u, s + v.ss, d + 1);
}
 
void merge_dfs(int u, int p) {
	ll target = K + 2 * sum[u];
	for (auto v : adj[u]) {
		if (v.ff == p) continue;
		merge_dfs(v.ff, u);
		if (sum_to_dist[v.ff].size() > sum_to_dist[u].size()) swap(sum_to_dist[v.ff], sum_to_dist[u]);
		for (auto p : sum_to_dist[v.ff]) if (sum_to_dist[u].find(target - p.ff) != sum_to_dist[u].end()) ans = min(ans, sum_to_dist[u][target - p.ff] + p.ss - 2 * dist[u]);
		for (auto p : sum_to_dist[v.ff]) {
			if (sum_to_dist[u].find(p.ff) == sum_to_dist[u].end()) sum_to_dist[u].insert(p);
			else sum_to_dist[u][p.ff] = min(sum_to_dist[u][p.ff], p.ss);
		}
	}
}
 
int best_path(int n, int k, int h[][2], int l[]) {
	if (k == 1) return 0;
	N = n; K = k; ans = INT_MAX;
	for (int i = 0; i < n - 1; i++) {
		int u = h[i][0], v = h[i][1];
		adj[u].pb(make_pair(v, l[i]));
		adj[v].pb(make_pair(u, l[i]));
	}
	dfs(0, -1, 0, 0);
	merge_dfs(0, -1);
	return ans == INT_MAX ? -1 : ans;
}
# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 21080 KB Output is correct
2 Correct 5 ms 21340 KB Output is correct
3 Correct 5 ms 21336 KB Output is correct
4 Correct 4 ms 21084 KB Output is correct
5 Correct 4 ms 21080 KB Output is correct
6 Correct 4 ms 21084 KB Output is correct
7 Correct 4 ms 21080 KB Output is correct
8 Correct 4 ms 21080 KB Output is correct
9 Correct 4 ms 21084 KB Output is correct
10 Correct 4 ms 21084 KB Output is correct
11 Correct 4 ms 21340 KB Output is correct
12 Correct 4 ms 21176 KB Output is correct
13 Correct 4 ms 21084 KB Output is correct
14 Correct 4 ms 21340 KB Output is correct
15 Correct 5 ms 21084 KB Output is correct
16 Correct 4 ms 21084 KB Output is correct
17 Correct 4 ms 21340 KB Output is correct
18 Correct 5 ms 21084 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 21080 KB Output is correct
2 Correct 5 ms 21340 KB Output is correct
3 Correct 5 ms 21336 KB Output is correct
4 Correct 4 ms 21084 KB Output is correct
5 Correct 4 ms 21080 KB Output is correct
6 Correct 4 ms 21084 KB Output is correct
7 Correct 4 ms 21080 KB Output is correct
8 Correct 4 ms 21080 KB Output is correct
9 Correct 4 ms 21084 KB Output is correct
10 Correct 4 ms 21084 KB Output is correct
11 Correct 4 ms 21340 KB Output is correct
12 Correct 4 ms 21176 KB Output is correct
13 Correct 4 ms 21084 KB Output is correct
14 Correct 4 ms 21340 KB Output is correct
15 Correct 5 ms 21084 KB Output is correct
16 Correct 4 ms 21084 KB Output is correct
17 Correct 4 ms 21340 KB Output is correct
18 Correct 5 ms 21084 KB Output is correct
19 Correct 4 ms 21084 KB Output is correct
20 Correct 4 ms 21272 KB Output is correct
21 Correct 5 ms 21340 KB Output is correct
22 Correct 6 ms 21596 KB Output is correct
23 Correct 5 ms 21596 KB Output is correct
24 Correct 6 ms 21592 KB Output is correct
25 Correct 5 ms 21596 KB Output is correct
26 Correct 5 ms 21596 KB Output is correct
27 Correct 5 ms 21340 KB Output is correct
28 Correct 5 ms 21592 KB Output is correct
29 Correct 5 ms 21596 KB Output is correct
30 Correct 6 ms 21552 KB Output is correct
31 Correct 5 ms 21596 KB Output is correct
32 Correct 5 ms 21340 KB Output is correct
33 Correct 6 ms 21632 KB Output is correct
34 Correct 5 ms 21340 KB Output is correct
35 Correct 5 ms 21364 KB Output is correct
36 Correct 5 ms 21340 KB Output is correct
37 Correct 5 ms 21536 KB Output is correct
38 Correct 6 ms 21556 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 21080 KB Output is correct
2 Correct 5 ms 21340 KB Output is correct
3 Correct 5 ms 21336 KB Output is correct
4 Correct 4 ms 21084 KB Output is correct
5 Correct 4 ms 21080 KB Output is correct
6 Correct 4 ms 21084 KB Output is correct
7 Correct 4 ms 21080 KB Output is correct
8 Correct 4 ms 21080 KB Output is correct
9 Correct 4 ms 21084 KB Output is correct
10 Correct 4 ms 21084 KB Output is correct
11 Correct 4 ms 21340 KB Output is correct
12 Correct 4 ms 21176 KB Output is correct
13 Correct 4 ms 21084 KB Output is correct
14 Correct 4 ms 21340 KB Output is correct
15 Correct 5 ms 21084 KB Output is correct
16 Correct 4 ms 21084 KB Output is correct
17 Correct 4 ms 21340 KB Output is correct
18 Correct 5 ms 21084 KB Output is correct
19 Correct 116 ms 44220 KB Output is correct
20 Correct 130 ms 45444 KB Output is correct
21 Correct 104 ms 44476 KB Output is correct
22 Correct 113 ms 44840 KB Output is correct
23 Correct 135 ms 57792 KB Output is correct
24 Correct 132 ms 47516 KB Output is correct
25 Correct 95 ms 46160 KB Output is correct
26 Correct 53 ms 53844 KB Output is correct
27 Correct 176 ms 54864 KB Output is correct
28 Correct 260 ms 97124 KB Output is correct
29 Correct 275 ms 95464 KB Output is correct
30 Correct 185 ms 55532 KB Output is correct
31 Correct 168 ms 55584 KB Output is correct
32 Correct 285 ms 55376 KB Output is correct
33 Correct 270 ms 60364 KB Output is correct
34 Correct 336 ms 92684 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 21080 KB Output is correct
2 Correct 5 ms 21340 KB Output is correct
3 Correct 5 ms 21336 KB Output is correct
4 Correct 4 ms 21084 KB Output is correct
5 Correct 4 ms 21080 KB Output is correct
6 Correct 4 ms 21084 KB Output is correct
7 Correct 4 ms 21080 KB Output is correct
8 Correct 4 ms 21080 KB Output is correct
9 Correct 4 ms 21084 KB Output is correct
10 Correct 4 ms 21084 KB Output is correct
11 Correct 4 ms 21340 KB Output is correct
12 Correct 4 ms 21176 KB Output is correct
13 Correct 4 ms 21084 KB Output is correct
14 Correct 4 ms 21340 KB Output is correct
15 Correct 5 ms 21084 KB Output is correct
16 Correct 4 ms 21084 KB Output is correct
17 Correct 4 ms 21340 KB Output is correct
18 Correct 5 ms 21084 KB Output is correct
19 Correct 4 ms 21084 KB Output is correct
20 Correct 4 ms 21272 KB Output is correct
21 Correct 5 ms 21340 KB Output is correct
22 Correct 6 ms 21596 KB Output is correct
23 Correct 5 ms 21596 KB Output is correct
24 Correct 6 ms 21592 KB Output is correct
25 Correct 5 ms 21596 KB Output is correct
26 Correct 5 ms 21596 KB Output is correct
27 Correct 5 ms 21340 KB Output is correct
28 Correct 5 ms 21592 KB Output is correct
29 Correct 5 ms 21596 KB Output is correct
30 Correct 6 ms 21552 KB Output is correct
31 Correct 5 ms 21596 KB Output is correct
32 Correct 5 ms 21340 KB Output is correct
33 Correct 6 ms 21632 KB Output is correct
34 Correct 5 ms 21340 KB Output is correct
35 Correct 5 ms 21364 KB Output is correct
36 Correct 5 ms 21340 KB Output is correct
37 Correct 5 ms 21536 KB Output is correct
38 Correct 6 ms 21556 KB Output is correct
39 Correct 116 ms 44220 KB Output is correct
40 Correct 130 ms 45444 KB Output is correct
41 Correct 104 ms 44476 KB Output is correct
42 Correct 113 ms 44840 KB Output is correct
43 Correct 135 ms 57792 KB Output is correct
44 Correct 132 ms 47516 KB Output is correct
45 Correct 95 ms 46160 KB Output is correct
46 Correct 53 ms 53844 KB Output is correct
47 Correct 176 ms 54864 KB Output is correct
48 Correct 260 ms 97124 KB Output is correct
49 Correct 275 ms 95464 KB Output is correct
50 Correct 185 ms 55532 KB Output is correct
51 Correct 168 ms 55584 KB Output is correct
52 Correct 285 ms 55376 KB Output is correct
53 Correct 270 ms 60364 KB Output is correct
54 Correct 336 ms 92684 KB Output is correct
55 Correct 17 ms 24412 KB Output is correct
56 Correct 10 ms 22876 KB Output is correct
57 Correct 67 ms 41924 KB Output is correct
58 Correct 43 ms 35532 KB Output is correct
59 Correct 92 ms 60212 KB Output is correct
60 Correct 274 ms 96040 KB Output is correct
61 Correct 219 ms 58384 KB Output is correct
62 Correct 182 ms 55380 KB Output is correct
63 Correct 239 ms 55376 KB Output is correct
64 Correct 394 ms 108624 KB Output is correct
65 Correct 406 ms 108476 KB Output is correct
66 Correct 295 ms 89328 KB Output is correct
67 Correct 154 ms 49080 KB Output is correct
68 Correct 314 ms 71572 KB Output is correct
69 Correct 345 ms 73980 KB Output is correct
70 Correct 316 ms 70236 KB Output is correct