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답안 #384109

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
384109 2021-03-31T12:58:41 Z peuch 경주 (Race) (IOI11_race) C++17
100 / 100
 1112 ms 45292 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;

const int MAXN = 200010; 
const int MAXA = 1000010;
const int INF = 1e8;

int n, k;

vector<int> ar[MAXN];
vector<int> wg[MAXN];

int tam;
int sub[MAXN];
int marc[MAXN];
int minProf[MAXA];

int ans;

void centDecomp(int cur);
void preCalc(int cur, int pai);
int getCent(int cur, int pai);
void getAns(int cur, int pai, int prof, int dist);
void addProf(int cur, int pai, int prof, int dist);
void removeProf(int cur, int pai, int dist);

int best_path(int N, int K, int H[][2], int L[]){
	n = N;
	k = K;
	for(int i = 0; i < n - 1; i++){
		ar[H[i][0]].push_back(H[i][1]);
		ar[H[i][1]].push_back(H[i][0]);
		wg[H[i][0]].push_back(L[i]);
		wg[H[i][1]].push_back(L[i]);
	}
	for(int i = 0; i <= k; i++)
		minProf[i] = INF;
	ans = INF;
	centDecomp(1);
	if(ans >= INF) ans = -1;
	return ans;
}

void centDecomp(int cur){
	tam = 0;
	preCalc(cur, cur);
	int cent = getCent(cur, cur);
	marc[cent] = 1;
	minProf[0] = 0;
	for(int i = 0; i < (int)ar[cent].size(); i++){
		int viz = ar[cent][i];
		if(marc[viz]) continue;
		getAns(viz, cent, 1, wg[cent][i]);
		addProf(viz, cent, 1, wg[cent][i]);
	}
	removeProf(cent, cent, 0);
	for(int i = 0; i < (int)ar[cent].size(); i++){
		int viz = ar[cent][i];
		if(marc[viz]) continue;
		centDecomp(viz);
	}
}

void preCalc(int cur, int pai){
	tam++;
	sub[cur] = 1;
	for(int i = 0; i < (int)ar[cur].size(); i++){
		int viz = ar[cur][i];
		if(viz == pai || marc[viz]) continue;
		preCalc(viz, cur);
		sub[cur] += sub[viz];
	}
}

int getCent(int cur, int pai){
	for(int i = 0; i < (int)ar[cur].size(); i++){
		int viz = ar[cur][i];
		if(viz == pai || marc[viz] || sub[viz] < tam / 2) continue;
		return getCent(viz, cur);
	}
	return cur;
}

void getAns(int cur, int pai, int prof, int dist){
	dist = min(dist, INF);
	if(dist <= k) ans = min(ans, minProf[k - dist] + prof);
	for(int i = 0; i < (int)ar[cur].size(); i++){
		int viz = ar[cur][i];
		if(viz == pai || marc[viz]) continue;
		getAns(viz, cur, prof + 1, dist + wg[cur][i]);
	}
}

void addProf(int cur, int pai, int prof, int dist){
	dist = min(dist, INF);
	if(dist <= k) minProf[dist] = min(minProf[dist], prof);
	for(int i = 0; i < (int)ar[cur].size(); i++){
		int viz = ar[cur][i];
		if(viz == pai || marc[viz]) continue;
		addProf(viz, cur, prof + 1, dist + wg[cur][i]);
	}
}

void removeProf(int cur, int pai, int dist){
	dist = min(dist, INF);
	if(dist <= k) minProf[dist] = INF;
	for(int i = 0; i < (int)ar[cur].size(); i++){
		int viz = ar[cur][i];
		if(viz == pai || marc[viz]) continue;
		removeProf(viz, cur, dist + wg[cur][i]);
	}
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 8 ms 9776 KB Output is correct
5 Correct 8 ms 9708 KB Output is correct
6 Correct 7 ms 9708 KB Output is correct
7 Correct 8 ms 9708 KB Output is correct
8 Correct 7 ms 9708 KB Output is correct
9 Correct 8 ms 9708 KB Output is correct
10 Correct 8 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 8 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 8 ms 9708 KB Output is correct
17 Correct 8 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 8 ms 9776 KB Output is correct
5 Correct 8 ms 9708 KB Output is correct
6 Correct 7 ms 9708 KB Output is correct
7 Correct 8 ms 9708 KB Output is correct
8 Correct 7 ms 9708 KB Output is correct
9 Correct 8 ms 9708 KB Output is correct
10 Correct 8 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 8 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 8 ms 9708 KB Output is correct
17 Correct 8 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct
19 Correct 8 ms 9708 KB Output is correct
20 Correct 8 ms 9708 KB Output is correct
21 Correct 9 ms 9964 KB Output is correct
22 Correct 11 ms 13420 KB Output is correct
23 Correct 13 ms 12780 KB Output is correct
24 Correct 11 ms 13164 KB Output is correct
25 Correct 11 ms 13164 KB Output is correct
26 Correct 10 ms 11116 KB Output is correct
27 Correct 11 ms 13036 KB Output is correct
28 Correct 11 ms 10604 KB Output is correct
29 Correct 9 ms 11116 KB Output is correct
30 Correct 10 ms 11244 KB Output is correct
31 Correct 10 ms 12396 KB Output is correct
32 Correct 10 ms 12652 KB Output is correct
33 Correct 11 ms 12908 KB Output is correct
34 Correct 10 ms 12156 KB Output is correct
35 Correct 12 ms 13036 KB Output is correct
36 Correct 11 ms 13420 KB Output is correct
37 Correct 11 ms 12908 KB Output is correct
38 Correct 10 ms 11884 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 8 ms 9776 KB Output is correct
5 Correct 8 ms 9708 KB Output is correct
6 Correct 7 ms 9708 KB Output is correct
7 Correct 8 ms 9708 KB Output is correct
8 Correct 7 ms 9708 KB Output is correct
9 Correct 8 ms 9708 KB Output is correct
10 Correct 8 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 8 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 8 ms 9708 KB Output is correct
17 Correct 8 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct
19 Correct 315 ms 19436 KB Output is correct
20 Correct 379 ms 19472 KB Output is correct
21 Correct 333 ms 19436 KB Output is correct
22 Correct 304 ms 19820 KB Output is correct
23 Correct 203 ms 19436 KB Output is correct
24 Correct 129 ms 20076 KB Output is correct
25 Correct 311 ms 26348 KB Output is correct
26 Correct 140 ms 27372 KB Output is correct
27 Correct 425 ms 30188 KB Output is correct
28 Correct 904 ms 43376 KB Output is correct
29 Correct 871 ms 38228 KB Output is correct
30 Correct 430 ms 30188 KB Output is correct
31 Correct 386 ms 29932 KB Output is correct
32 Correct 544 ms 29932 KB Output is correct
33 Correct 637 ms 29016 KB Output is correct
34 Correct 623 ms 28908 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 8 ms 9776 KB Output is correct
5 Correct 8 ms 9708 KB Output is correct
6 Correct 7 ms 9708 KB Output is correct
7 Correct 8 ms 9708 KB Output is correct
8 Correct 7 ms 9708 KB Output is correct
9 Correct 8 ms 9708 KB Output is correct
10 Correct 8 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 8 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 8 ms 9708 KB Output is correct
17 Correct 8 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct
19 Correct 8 ms 9708 KB Output is correct
20 Correct 8 ms 9708 KB Output is correct
21 Correct 9 ms 9964 KB Output is correct
22 Correct 11 ms 13420 KB Output is correct
23 Correct 13 ms 12780 KB Output is correct
24 Correct 11 ms 13164 KB Output is correct
25 Correct 11 ms 13164 KB Output is correct
26 Correct 10 ms 11116 KB Output is correct
27 Correct 11 ms 13036 KB Output is correct
28 Correct 11 ms 10604 KB Output is correct
29 Correct 9 ms 11116 KB Output is correct
30 Correct 10 ms 11244 KB Output is correct
31 Correct 10 ms 12396 KB Output is correct
32 Correct 10 ms 12652 KB Output is correct
33 Correct 11 ms 12908 KB Output is correct
34 Correct 10 ms 12156 KB Output is correct
35 Correct 12 ms 13036 KB Output is correct
36 Correct 11 ms 13420 KB Output is correct
37 Correct 11 ms 12908 KB Output is correct
38 Correct 10 ms 11884 KB Output is correct
39 Correct 315 ms 19436 KB Output is correct
40 Correct 379 ms 19472 KB Output is correct
41 Correct 333 ms 19436 KB Output is correct
42 Correct 304 ms 19820 KB Output is correct
43 Correct 203 ms 19436 KB Output is correct
44 Correct 129 ms 20076 KB Output is correct
45 Correct 311 ms 26348 KB Output is correct
46 Correct 140 ms 27372 KB Output is correct
47 Correct 425 ms 30188 KB Output is correct
48 Correct 904 ms 43376 KB Output is correct
49 Correct 871 ms 38228 KB Output is correct
50 Correct 430 ms 30188 KB Output is correct
51 Correct 386 ms 29932 KB Output is correct
52 Correct 544 ms 29932 KB Output is correct
53 Correct 637 ms 29016 KB Output is correct
54 Correct 623 ms 28908 KB Output is correct
55 Correct 21 ms 10732 KB Output is correct
56 Correct 21 ms 10732 KB Output is correct
57 Correct 129 ms 19436 KB Output is correct
58 Correct 57 ms 19804 KB Output is correct
59 Correct 157 ms 27820 KB Output is correct
60 Correct 961 ms 40300 KB Output is correct
61 Correct 402 ms 29676 KB Output is correct
62 Correct 412 ms 33176 KB Output is correct
63 Correct 542 ms 33388 KB Output is correct
64 Correct 1112 ms 30432 KB Output is correct
65 Correct 809 ms 28652 KB Output is correct
66 Correct 975 ms 45292 KB Output is correct
67 Correct 235 ms 33492 KB Output is correct
68 Correct 588 ms 33388 KB Output is correct
69 Correct 616 ms 33532 KB Output is correct
70 Correct 542 ms 32620 KB Output is correct