oj.uz

답안 #684052

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
684052 2023-01-20T08:18:43 Z fuad27 경주 (Race) (IOI11_race) C++17
100 / 100
 1240 ms 51660 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;
const int N =200'010; 
long long K=0;
vector<pair<int, long long>> g[N];
vector<bool> R(N);
int dp[N];
int dfs(int at, int p) {
	dp[at]=1;
	for(auto to:g[at]) {
		if(to.first!=p and !R[to.first]) {
			dp[at]+=dfs(to.first,at);
		}
	}
	return dp[at];
}
int get_centroid(int at, int sz, int p) {
	for(auto to:g[at]) {
		if(to.first==p or R[to.first])continue;
		if(dp[to.first]*2>sz)return get_centroid(to.first,sz,at);
	}
	return at;
}
long long res=1e18;
map<long long, int> mp;
map<long long, int> mp2;
void dfs1(int at, int p, long long w, int d=1) {
	if(mp2.find(w)==mp2.end() or mp2[w]>d) {
		mp2[w]=d;
		if(mp.find(K-w)!=mp.end())
		res=min(res,(long long)mp2[w]+mp[K-w]);
	}
	for(auto to:g[at]) {
		if(R[to.first])continue;
		if(to.first==p)continue;
		dfs1(to.first,at,w+to.second,d+1);
	}
}
void get(int at) {

	mp.clear();
	mp2.clear();
	mp[0]=0;
	for(auto to:g[at]) {
		if(R[to.first])continue;
		dfs1(to.first,at,to.second);
		for(auto i:mp2) {
			if(mp.find(i.first)==mp.end())mp[i.first]=i.second;
			else mp[i.first]=min(mp[i.first],i.second);
		}
		mp2.clear();
	}
}
void centroid(int n=0) {
	int C=get_centroid(n,dfs(n,-1),-1);
	get(C);
	R[C]=1;
	for(auto to:g[C]) {
		if(!R[to.first])centroid(to.first);
	}
}
int best_path(int n, int k, int h[][2], int l[])
{
	K=k;
	for(int i = 0;i<n-1;i++) {
		g[h[i][0]].push_back({h[i][1],l[i]});
		g[h[i][1]].push_back({h[i][0],l[i]});
	}
	centroid();
	if(res==1e18)return -1;
	return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 5032 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5036 KB Output is correct
11 Correct 3 ms 5032 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 5032 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5036 KB Output is correct
11 Correct 3 ms 5032 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 5152 KB Output is correct
22 Correct 5 ms 5176 KB Output is correct
23 Correct 6 ms 5212 KB Output is correct
24 Correct 5 ms 5172 KB Output is correct
25 Correct 5 ms 5204 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 4 ms 5044 KB Output is correct
28 Correct 6 ms 5076 KB Output is correct
29 Correct 4 ms 5176 KB Output is correct
30 Correct 6 ms 5176 KB Output is correct
31 Correct 5 ms 5076 KB Output is correct
32 Correct 4 ms 5204 KB Output is correct
33 Correct 5 ms 5180 KB Output is correct
34 Correct 5 ms 5204 KB Output is correct
35 Correct 5 ms 5076 KB Output is correct
36 Correct 6 ms 5076 KB Output is correct
37 Correct 6 ms 5076 KB Output is correct
38 Correct 5 ms 5076 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 5032 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5036 KB Output is correct
11 Correct 3 ms 5032 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 260 ms 13060 KB Output is correct
20 Correct 243 ms 13068 KB Output is correct
21 Correct 227 ms 12972 KB Output is correct
22 Correct 213 ms 13100 KB Output is correct
23 Correct 329 ms 13620 KB Output is correct
24 Correct 165 ms 12748 KB Output is correct
25 Correct 170 ms 18736 KB Output is correct
26 Correct 91 ms 18856 KB Output is correct
27 Correct 369 ms 22060 KB Output is correct
28 Correct 1240 ms 51660 KB Output is correct
29 Correct 1228 ms 50852 KB Output is correct
30 Correct 377 ms 21972 KB Output is correct
31 Correct 352 ms 22056 KB Output is correct
32 Correct 436 ms 22132 KB Output is correct
33 Correct 522 ms 21004 KB Output is correct
34 Correct 1054 ms 37264 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 5032 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5036 KB Output is correct
11 Correct 3 ms 5032 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 5152 KB Output is correct
22 Correct 5 ms 5176 KB Output is correct
23 Correct 6 ms 5212 KB Output is correct
24 Correct 5 ms 5172 KB Output is correct
25 Correct 5 ms 5204 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 4 ms 5044 KB Output is correct
28 Correct 6 ms 5076 KB Output is correct
29 Correct 4 ms 5176 KB Output is correct
30 Correct 6 ms 5176 KB Output is correct
31 Correct 5 ms 5076 KB Output is correct
32 Correct 4 ms 5204 KB Output is correct
33 Correct 5 ms 5180 KB Output is correct
34 Correct 5 ms 5204 KB Output is correct
35 Correct 5 ms 5076 KB Output is correct
36 Correct 6 ms 5076 KB Output is correct
37 Correct 6 ms 5076 KB Output is correct
38 Correct 5 ms 5076 KB Output is correct
39 Correct 260 ms 13060 KB Output is correct
40 Correct 243 ms 13068 KB Output is correct
41 Correct 227 ms 12972 KB Output is correct
42 Correct 213 ms 13100 KB Output is correct
43 Correct 329 ms 13620 KB Output is correct
44 Correct 165 ms 12748 KB Output is correct
45 Correct 170 ms 18736 KB Output is correct
46 Correct 91 ms 18856 KB Output is correct
47 Correct 369 ms 22060 KB Output is correct
48 Correct 1240 ms 51660 KB Output is correct
49 Correct 1228 ms 50852 KB Output is correct
50 Correct 377 ms 21972 KB Output is correct
51 Correct 352 ms 22056 KB Output is correct
52 Correct 436 ms 22132 KB Output is correct
53 Correct 522 ms 21004 KB Output is correct
54 Correct 1054 ms 37264 KB Output is correct
55 Correct 28 ms 6228 KB Output is correct
56 Correct 17 ms 5776 KB Output is correct
57 Correct 156 ms 13408 KB Output is correct
58 Correct 53 ms 12356 KB Output is correct
59 Correct 431 ms 26708 KB Output is correct
60 Correct 1217 ms 50096 KB Output is correct
61 Correct 410 ms 23892 KB Output is correct
62 Correct 384 ms 22224 KB Output is correct
63 Correct 409 ms 22124 KB Output is correct
64 Correct 1227 ms 30628 KB Output is correct
65 Correct 1026 ms 35264 KB Output is correct
66 Correct 1238 ms 50476 KB Output is correct
67 Correct 141 ms 21080 KB Output is correct
68 Correct 586 ms 32568 KB Output is correct
69 Correct 611 ms 32892 KB Output is correct
70 Correct 559 ms 31276 KB Output is correct