oj.uz

답안 #441188

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
441188 2021-07-04T14:15:32 Z Pietra 경주 (Race) (IOI11_race) C++14
100 / 100
 681 ms 36932 KB 
#include<bits/stdc++.h>
#include "race.h"
#define mk make_pair
#define pb push_back
#define pii pair<int,int>
#define ll long long 
#define f first 
#define s second 
 
using namespace std ; 
 
const int inf = 1e9 + 5 ; 
const int maxn = 2e5 + 5 ; 
const int MAX = 1e6 + 5 ; 
 
int ans = inf ;
int freq[MAX], k, sz[maxn], mark[maxn] ;  
vector<pii> grafo[maxn] ; 
 
void dfs(int v, int p){
	
	sz[v] = 1 ; 
 
	for(pii a : grafo[v]){
		
		if(mark[a.f] || a.f == p) continue ; 
		dfs(a.f, v) ;  
		sz[v] += sz[a.f] ; 
 
	}
 
}
 
int centroid(int u, int p, int qtd){
 
	for(pii a : grafo[u]){

		if(a.f == p || mark[a.f] || sz[a.f]*2 <= qtd) continue ; 
		
		return centroid(a.f, u, qtd) ; 
	
	}
 
	return u ; 
 
}
 
void add(int u, int p, int v, int dist, int len){
	
	if(dist > k) return ; 
 
	if(v == -1) freq[dist] = inf ; //voltar p fzr p prox cent 
	else freq[dist] = min(freq[dist], len) ; //unir c a outra sub 
 
	for(pii a : grafo[u]){

		if(a.f == p || mark[a.f]) continue ; 
		add(a.f, u, v, dist + a.s, len + 1) ; 
	
	}
 
}
 
void solve(int u, int p, int dist, int len){
 
	if(dist > k) return ; //n tem como ter tam k 
	ans = min(ans, freq[k-dist] + len) ; // quais caras eu uso com tam k -> usamos len p ter dist -> queremos minimizar
 
	for(pii a : grafo[u]){
		if(a.f == p || mark[a.f]) continue ; 
		solve(a.f, u, dist + a.s, len+1) ;  
	}
 
}
 
void make_a(int v, int p){
 
	dfs(v, p) ; 
 
	int c = centroid(v, p, sz[v]) ;
 
	mark[c] = 1 ; 
	
	freq[0] = 0 ; 
 
	for(pii a : grafo[c]){
		if(mark[a.f] || a.f == p) continue ; 
		solve(a.f, c, a.s, 1) ; //resolver p minha 
		add(a.f, c, 1, a.s, 1) ; //add a minha p fzr c proxs 
	}
 
	for(pii a : grafo[c]){
		if(mark[a.f] || a.f == p) continue ; 
		add(a.f, c, -1, a.s, 1) ; //retirar tds p fzr p prox 
	}
 
	for(pii a : grafo[c]) if(!(a.f == p || mark[a.f])) make_a(a.f, c) ; //prox cent
 
}
 
 
int best_path(int N, int K, int H[maxn][2], int L[maxn]){
 
	for(int i = 0 ; i < N - 1 ; i++){
		grafo[H[i][0]].pb({H[i][1], L[i]}) ;
		grafo[H[i][1]].pb({H[i][0], L[i]}) ;
	}
	
	k = K ; 
 
	for(int i = 1 ; i <= k ; i++) freq[i] = inf ; 
 
	make_a(0, -1) ; 
    
    return (ans != inf ? ans : -1) ;
 
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4976 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 5028 KB Output is correct
5 Correct 3 ms 5012 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5000 KB Output is correct
10 Correct 3 ms 5004 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 5004 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4976 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 5028 KB Output is correct
5 Correct 3 ms 5012 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5000 KB Output is correct
10 Correct 3 ms 5004 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 5004 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 6 ms 8652 KB Output is correct
23 Correct 5 ms 8012 KB Output is correct
24 Correct 6 ms 8396 KB Output is correct
25 Correct 6 ms 8268 KB Output is correct
26 Correct 5 ms 6348 KB Output is correct
27 Correct 5 ms 8140 KB Output is correct
28 Correct 4 ms 5836 KB Output is correct
29 Correct 4 ms 6348 KB Output is correct
30 Correct 5 ms 6476 KB Output is correct
31 Correct 5 ms 7628 KB Output is correct
32 Correct 5 ms 7756 KB Output is correct
33 Correct 6 ms 8140 KB Output is correct
34 Correct 5 ms 7372 KB Output is correct
35 Correct 6 ms 8268 KB Output is correct
36 Correct 6 ms 8676 KB Output is correct
37 Correct 6 ms 8140 KB Output is correct
38 Correct 6 ms 6968 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4976 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 5028 KB Output is correct
5 Correct 3 ms 5012 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5000 KB Output is correct
10 Correct 3 ms 5004 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 5004 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 157 ms 12044 KB Output is correct
20 Correct 152 ms 11880 KB Output is correct
21 Correct 182 ms 11992 KB Output is correct
22 Correct 173 ms 12084 KB Output is correct
23 Correct 87 ms 12228 KB Output is correct
24 Correct 64 ms 12120 KB Output is correct
25 Correct 146 ms 15560 KB Output is correct
26 Correct 113 ms 19204 KB Output is correct
27 Correct 191 ms 19272 KB Output is correct
28 Correct 300 ms 33952 KB Output is correct
29 Correct 293 ms 32836 KB Output is correct
30 Correct 197 ms 19292 KB Output is correct
31 Correct 196 ms 19372 KB Output is correct
32 Correct 243 ms 19416 KB Output is correct
33 Correct 245 ms 18348 KB Output is correct
34 Correct 224 ms 19048 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4976 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 5028 KB Output is correct
5 Correct 3 ms 5012 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5000 KB Output is correct
10 Correct 3 ms 5004 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 5004 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 6 ms 8652 KB Output is correct
23 Correct 5 ms 8012 KB Output is correct
24 Correct 6 ms 8396 KB Output is correct
25 Correct 6 ms 8268 KB Output is correct
26 Correct 5 ms 6348 KB Output is correct
27 Correct 5 ms 8140 KB Output is correct
28 Correct 4 ms 5836 KB Output is correct
29 Correct 4 ms 6348 KB Output is correct
30 Correct 5 ms 6476 KB Output is correct
31 Correct 5 ms 7628 KB Output is correct
32 Correct 5 ms 7756 KB Output is correct
33 Correct 6 ms 8140 KB Output is correct
34 Correct 5 ms 7372 KB Output is correct
35 Correct 6 ms 8268 KB Output is correct
36 Correct 6 ms 8676 KB Output is correct
37 Correct 6 ms 8140 KB Output is correct
38 Correct 6 ms 6968 KB Output is correct
39 Correct 157 ms 12044 KB Output is correct
40 Correct 152 ms 11880 KB Output is correct
41 Correct 182 ms 11992 KB Output is correct
42 Correct 173 ms 12084 KB Output is correct
43 Correct 87 ms 12228 KB Output is correct
44 Correct 64 ms 12120 KB Output is correct
45 Correct 146 ms 15560 KB Output is correct
46 Correct 113 ms 19204 KB Output is correct
47 Correct 191 ms 19272 KB Output is correct
48 Correct 300 ms 33952 KB Output is correct
49 Correct 293 ms 32836 KB Output is correct
50 Correct 197 ms 19292 KB Output is correct
51 Correct 196 ms 19372 KB Output is correct
52 Correct 243 ms 19416 KB Output is correct
53 Correct 245 ms 18348 KB Output is correct
54 Correct 224 ms 19048 KB Output is correct
55 Correct 12 ms 5656 KB Output is correct
56 Correct 14 ms 5692 KB Output is correct
57 Correct 94 ms 12184 KB Output is correct
58 Correct 43 ms 12052 KB Output is correct
59 Correct 112 ms 19892 KB Output is correct
60 Correct 566 ms 36932 KB Output is correct
61 Correct 214 ms 19524 KB Output is correct
62 Correct 235 ms 23344 KB Output is correct
63 Correct 338 ms 23372 KB Output is correct
64 Correct 681 ms 21832 KB Output is correct
65 Correct 255 ms 20204 KB Output is correct
66 Correct 471 ms 34244 KB Output is correct
67 Correct 138 ms 23916 KB Output is correct
68 Correct 330 ms 24096 KB Output is correct
69 Correct 331 ms 24388 KB Output is correct
70 Correct 306 ms 23428 KB Output is correct