oj.uz

답안 #866689

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
866689 2023-10-26T18:03:11 Z Irate 경주 (Race) (IOI11_race) C++14
100 / 100
 372 ms 107444 KB 
#include<bits/stdc++.h>
#include "race.h"
using namespace std;
const int mxN = 2e5 + 3;
vector<pair<int, int>>G[mxN];
map<long long, int>cnt[mxN]; 
long long length[mxN];
int K, mn = 1e9, depth[mxN];
void dfs(int node, int par){
	cnt[node][length[node]] = depth[node];
	for(pair<int, int>& v : G[node]){
		if(v.first != par){
			depth[v.first] = depth[node] + 1;
			length[v.first] = length[node] + v.second;
			dfs(v.first, node);
			if(cnt[node].size() < cnt[v.first].size())swap(cnt[node], cnt[v.first]);
			for(auto itr = cnt[v.first].begin();itr != cnt[v.first].end();++itr){
				long long num = itr->first;
				int dep = itr->second;
				if(cnt[node].count(K + 2 * length[node] - num)){
					mn = min(mn, dep + cnt[node][K + 2 * length[node] - num] - 2 * depth[node]);
				}
			}
			for(auto itr = cnt[v.first].begin();itr != cnt[v.first].end();++itr){
				if(cnt[node].count(itr->first)){
					cnt[node][itr->first] = min(cnt[node][itr->first], itr->second);
				}
				else{
					cnt[node][itr->first] = itr->second;
				}
			}
		}
	}
}
int best_path(int n, int k, int H[][2], int L[]){
	K = k;
	for(int i = 0;i < n - 1;++i){
		int u = H[i][0], v = H[i][1];
		G[u].push_back({v, L[i]});
		G[v].push_back({u, L[i]});
	}
	dfs(0, 0);
	if(mn == 1e9)return -1;
	return mn;
}
// int main()
// {
// 	ios_base::sync_with_stdio(0);
// 	cin.tie(0);
// 	int n;
// 	cin >> n >> K;
// 	int H[n - 1][2], L[n - 1];
// 	for(int i = 0;i < n - 1;++i){
// 		cin >> H[i][0] >> H[i][1] >> L[i];
// 	}
// 	cout << best_path(n, K, H, L);
// }
/*
11 12
0 1 3
0 2 4 
2 3 5
3 4 4
4 5 6
0 6 3
6 7 2
6 8 5
8 9 6
8 10 7
*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 20312 KB Output is correct
2 Correct 5 ms 20572 KB Output is correct
3 Correct 4 ms 20316 KB Output is correct
4 Correct 4 ms 20316 KB Output is correct
5 Correct 5 ms 20568 KB Output is correct
6 Correct 4 ms 20516 KB Output is correct
7 Correct 4 ms 20316 KB Output is correct
8 Correct 4 ms 20380 KB Output is correct
9 Correct 4 ms 20316 KB Output is correct
10 Correct 4 ms 20316 KB Output is correct
11 Correct 4 ms 20316 KB Output is correct
12 Correct 4 ms 20316 KB Output is correct
13 Correct 5 ms 20316 KB Output is correct
14 Correct 4 ms 20316 KB Output is correct
15 Correct 4 ms 20316 KB Output is correct
16 Correct 4 ms 20316 KB Output is correct
17 Correct 4 ms 20316 KB Output is correct
18 Correct 5 ms 20316 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 20312 KB Output is correct
2 Correct 5 ms 20572 KB Output is correct
3 Correct 4 ms 20316 KB Output is correct
4 Correct 4 ms 20316 KB Output is correct
5 Correct 5 ms 20568 KB Output is correct
6 Correct 4 ms 20516 KB Output is correct
7 Correct 4 ms 20316 KB Output is correct
8 Correct 4 ms 20380 KB Output is correct
9 Correct 4 ms 20316 KB Output is correct
10 Correct 4 ms 20316 KB Output is correct
11 Correct 4 ms 20316 KB Output is correct
12 Correct 4 ms 20316 KB Output is correct
13 Correct 5 ms 20316 KB Output is correct
14 Correct 4 ms 20316 KB Output is correct
15 Correct 4 ms 20316 KB Output is correct
16 Correct 4 ms 20316 KB Output is correct
17 Correct 4 ms 20316 KB Output is correct
18 Correct 5 ms 20316 KB Output is correct
19 Correct 4 ms 20316 KB Output is correct
20 Correct 4 ms 20488 KB Output is correct
21 Correct 5 ms 20572 KB Output is correct
22 Correct 5 ms 20824 KB Output is correct
23 Correct 5 ms 20584 KB Output is correct
24 Correct 5 ms 20784 KB Output is correct
25 Correct 5 ms 20572 KB Output is correct
26 Correct 6 ms 20828 KB Output is correct
27 Correct 4 ms 20568 KB Output is correct
28 Correct 6 ms 20572 KB Output is correct
29 Correct 6 ms 20784 KB Output is correct
30 Correct 5 ms 20572 KB Output is correct
31 Correct 5 ms 20572 KB Output is correct
32 Correct 5 ms 20572 KB Output is correct
33 Correct 5 ms 20828 KB Output is correct
34 Correct 4 ms 20572 KB Output is correct
35 Correct 4 ms 20572 KB Output is correct
36 Correct 4 ms 20544 KB Output is correct
37 Correct 5 ms 20572 KB Output is correct
38 Correct 5 ms 20572 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 20312 KB Output is correct
2 Correct 5 ms 20572 KB Output is correct
3 Correct 4 ms 20316 KB Output is correct
4 Correct 4 ms 20316 KB Output is correct
5 Correct 5 ms 20568 KB Output is correct
6 Correct 4 ms 20516 KB Output is correct
7 Correct 4 ms 20316 KB Output is correct
8 Correct 4 ms 20380 KB Output is correct
9 Correct 4 ms 20316 KB Output is correct
10 Correct 4 ms 20316 KB Output is correct
11 Correct 4 ms 20316 KB Output is correct
12 Correct 4 ms 20316 KB Output is correct
13 Correct 5 ms 20316 KB Output is correct
14 Correct 4 ms 20316 KB Output is correct
15 Correct 4 ms 20316 KB Output is correct
16 Correct 4 ms 20316 KB Output is correct
17 Correct 4 ms 20316 KB Output is correct
18 Correct 5 ms 20316 KB Output is correct
19 Correct 91 ms 43032 KB Output is correct
20 Correct 91 ms 43092 KB Output is correct
21 Correct 86 ms 42672 KB Output is correct
22 Correct 108 ms 42308 KB Output is correct
23 Correct 131 ms 55124 KB Output is correct
24 Correct 102 ms 45648 KB Output is correct
25 Correct 79 ms 41296 KB Output is correct
26 Correct 48 ms 47188 KB Output is correct
27 Correct 142 ms 50936 KB Output is correct
28 Correct 257 ms 84084 KB Output is correct
29 Correct 246 ms 83028 KB Output is correct
30 Correct 143 ms 50932 KB Output is correct
31 Correct 148 ms 51152 KB Output is correct
32 Correct 191 ms 51048 KB Output is correct
33 Correct 180 ms 55844 KB Output is correct
34 Correct 274 ms 88824 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 20312 KB Output is correct
2 Correct 5 ms 20572 KB Output is correct
3 Correct 4 ms 20316 KB Output is correct
4 Correct 4 ms 20316 KB Output is correct
5 Correct 5 ms 20568 KB Output is correct
6 Correct 4 ms 20516 KB Output is correct
7 Correct 4 ms 20316 KB Output is correct
8 Correct 4 ms 20380 KB Output is correct
9 Correct 4 ms 20316 KB Output is correct
10 Correct 4 ms 20316 KB Output is correct
11 Correct 4 ms 20316 KB Output is correct
12 Correct 4 ms 20316 KB Output is correct
13 Correct 5 ms 20316 KB Output is correct
14 Correct 4 ms 20316 KB Output is correct
15 Correct 4 ms 20316 KB Output is correct
16 Correct 4 ms 20316 KB Output is correct
17 Correct 4 ms 20316 KB Output is correct
18 Correct 5 ms 20316 KB Output is correct
19 Correct 4 ms 20316 KB Output is correct
20 Correct 4 ms 20488 KB Output is correct
21 Correct 5 ms 20572 KB Output is correct
22 Correct 5 ms 20824 KB Output is correct
23 Correct 5 ms 20584 KB Output is correct
24 Correct 5 ms 20784 KB Output is correct
25 Correct 5 ms 20572 KB Output is correct
26 Correct 6 ms 20828 KB Output is correct
27 Correct 4 ms 20568 KB Output is correct
28 Correct 6 ms 20572 KB Output is correct
29 Correct 6 ms 20784 KB Output is correct
30 Correct 5 ms 20572 KB Output is correct
31 Correct 5 ms 20572 KB Output is correct
32 Correct 5 ms 20572 KB Output is correct
33 Correct 5 ms 20828 KB Output is correct
34 Correct 4 ms 20572 KB Output is correct
35 Correct 4 ms 20572 KB Output is correct
36 Correct 4 ms 20544 KB Output is correct
37 Correct 5 ms 20572 KB Output is correct
38 Correct 5 ms 20572 KB Output is correct
39 Correct 91 ms 43032 KB Output is correct
40 Correct 91 ms 43092 KB Output is correct
41 Correct 86 ms 42672 KB Output is correct
42 Correct 108 ms 42308 KB Output is correct
43 Correct 131 ms 55124 KB Output is correct
44 Correct 102 ms 45648 KB Output is correct
45 Correct 79 ms 41296 KB Output is correct
46 Correct 48 ms 47188 KB Output is correct
47 Correct 142 ms 50936 KB Output is correct
48 Correct 257 ms 84084 KB Output is correct
49 Correct 246 ms 83028 KB Output is correct
50 Correct 143 ms 50932 KB Output is correct
51 Correct 148 ms 51152 KB Output is correct
52 Correct 191 ms 51048 KB Output is correct
53 Correct 180 ms 55844 KB Output is correct
54 Correct 274 ms 88824 KB Output is correct
55 Correct 15 ms 23388 KB Output is correct
56 Correct 10 ms 22108 KB Output is correct
57 Correct 59 ms 40276 KB Output is correct
58 Correct 41 ms 33732 KB Output is correct
59 Correct 86 ms 53696 KB Output is correct
60 Correct 250 ms 84252 KB Output is correct
61 Correct 176 ms 55764 KB Output is correct
62 Correct 139 ms 52272 KB Output is correct
63 Correct 189 ms 52308 KB Output is correct
64 Correct 372 ms 107444 KB Output is correct
65 Correct 369 ms 105640 KB Output is correct
66 Correct 271 ms 81452 KB Output is correct
67 Correct 136 ms 46784 KB Output is correct
68 Correct 289 ms 69392 KB Output is correct
69 Correct 308 ms 74248 KB Output is correct
70 Correct 276 ms 67596 KB Output is correct