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답안 #1113015

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1113015 2024-11-15T11:57:29 Z akzytr 경주 (Race) (IOI11_race) C++17
43 / 100
 3000 ms 93256 KB 
#include "race.h"
#include <bits/stdc++.h>
#define ve vector
#define pb push_back
#define ar array
#define ll long long
using namespace std;

const int MAXN = 3e5;
const int MAXK = 2e6 + 1;
set<int> adj[MAXN];
map<ar<int, 2>, int> w;

int K;
int ANS = 1e9;

int BOOK = 1;

int sub[MAXN];
int A[MAXK];
int BOOK_K[MAXK];
bool processed[MAXN];

void find_size(int x, int p) {
	sub[x] = 1;
	for(int i : adj[x]) {
		if(i != p && !processed[i]) {
			find_size(i, x);
			sub[x] += sub[i];
		}
	}
}
int find_centroid(int x, int p, int n) {
	for(int i : adj[x]) {
		if(sub[i] > n / 2 && i != p && !processed[i]) {
			return find_centroid(i, x, n);
		}
	}
	return x;
}

void dfs(int x, int p, int we, int num_edge, bool upd) {
	if(we > K) {
		return;
	}
	if(upd) {
		if(BOOK_K[we] != BOOK) {
			BOOK_K[we] = BOOK;
			A[we] = num_edge;
		} else {
			A[we] = min(A[we], num_edge);
		}
	} else {
		if(BOOK_K[K - we] == BOOK) {
			ANS = min(ANS, num_edge + A[K - we]);
		}
	}

	for(int i : adj[x]) {
		if(i != p && we + w[{i, x}] <= K) {
			dfs(i, x, we + w[{i, x}], num_edge + 1, upd);
		}
	}
}
void process_centroid(int x) {
	BOOK++;
	A[0] = 0;
	BOOK_K[0] = BOOK;

	for(int i : adj[x]) {
		dfs(i, x, w[{i, x}], 1, false);
		dfs(i, x, w[{i, x}], 1, true);
	}
}

void decompo(int x, int p) {
	find_size(x, -1);
	int centroid = find_centroid(x, -1, sub[x]);
	process_centroid(centroid);

	processed[x] = 1;
	for(int i : adj[centroid]) {
		adj[i].erase(centroid);
		decompo(i, x);
	}
}

int best_path(int N, int Ked, int H[][2], int L[]) {
	fill(A, A + MAXK, 0);
	fill(BOOK_K, BOOK_K + MAXK, 0);
	fill(processed, processed + MAXN, false);
	for(int i = 0; i < N - 1; i++) {
		int a, b;
		a = H[i][0];
		b = H[i][1];

		adj[a].insert(b);
		adj[b].insert(a);
		w[{a, b}] = L[i];
		w[{b, a}] = L[i];
	}
	K = Ked;
	decompo(0, -1);
	if(ANS != 1e9) {
		return ANS;
	}
	return -1;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 34384 KB Output is correct
2 Correct 18 ms 34384 KB Output is correct
3 Correct 14 ms 30544 KB Output is correct
4 Correct 16 ms 34396 KB Output is correct
5 Correct 11 ms 34384 KB Output is correct
6 Correct 12 ms 34548 KB Output is correct
7 Correct 16 ms 30544 KB Output is correct
8 Correct 13 ms 34384 KB Output is correct
9 Correct 18 ms 30544 KB Output is correct
10 Correct 17 ms 30544 KB Output is correct
11 Correct 17 ms 30712 KB Output is correct
12 Correct 15 ms 30544 KB Output is correct
13 Correct 14 ms 30544 KB Output is correct
14 Correct 22 ms 30612 KB Output is correct
15 Correct 16 ms 30544 KB Output is correct
16 Correct 17 ms 30544 KB Output is correct
17 Correct 22 ms 30536 KB Output is correct
18 Correct 18 ms 30544 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 34384 KB Output is correct
2 Correct 18 ms 34384 KB Output is correct
3 Correct 14 ms 30544 KB Output is correct
4 Correct 16 ms 34396 KB Output is correct
5 Correct 11 ms 34384 KB Output is correct
6 Correct 12 ms 34548 KB Output is correct
7 Correct 16 ms 30544 KB Output is correct
8 Correct 13 ms 34384 KB Output is correct
9 Correct 18 ms 30544 KB Output is correct
10 Correct 17 ms 30544 KB Output is correct
11 Correct 17 ms 30712 KB Output is correct
12 Correct 15 ms 30544 KB Output is correct
13 Correct 14 ms 30544 KB Output is correct
14 Correct 22 ms 30612 KB Output is correct
15 Correct 16 ms 30544 KB Output is correct
16 Correct 17 ms 30544 KB Output is correct
17 Correct 22 ms 30536 KB Output is correct
18 Correct 18 ms 30544 KB Output is correct
19 Correct 17 ms 30544 KB Output is correct
20 Correct 17 ms 30544 KB Output is correct
21 Correct 25 ms 30800 KB Output is correct
22 Correct 25 ms 30800 KB Output is correct
23 Correct 21 ms 30800 KB Output is correct
24 Correct 21 ms 30964 KB Output is correct
25 Correct 19 ms 30972 KB Output is correct
26 Correct 21 ms 30808 KB Output is correct
27 Correct 17 ms 30800 KB Output is correct
28 Correct 19 ms 30800 KB Output is correct
29 Correct 20 ms 30800 KB Output is correct
30 Correct 20 ms 31120 KB Output is correct
31 Correct 22 ms 30812 KB Output is correct
32 Correct 23 ms 30800 KB Output is correct
33 Correct 19 ms 30800 KB Output is correct
34 Correct 23 ms 30800 KB Output is correct
35 Correct 19 ms 30800 KB Output is correct
36 Correct 17 ms 30800 KB Output is correct
37 Correct 19 ms 30800 KB Output is correct
38 Correct 21 ms 30800 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 34384 KB Output is correct
2 Correct 18 ms 34384 KB Output is correct
3 Correct 14 ms 30544 KB Output is correct
4 Correct 16 ms 34396 KB Output is correct
5 Correct 11 ms 34384 KB Output is correct
6 Correct 12 ms 34548 KB Output is correct
7 Correct 16 ms 30544 KB Output is correct
8 Correct 13 ms 34384 KB Output is correct
9 Correct 18 ms 30544 KB Output is correct
10 Correct 17 ms 30544 KB Output is correct
11 Correct 17 ms 30712 KB Output is correct
12 Correct 15 ms 30544 KB Output is correct
13 Correct 14 ms 30544 KB Output is correct
14 Correct 22 ms 30612 KB Output is correct
15 Correct 16 ms 30544 KB Output is correct
16 Correct 17 ms 30544 KB Output is correct
17 Correct 22 ms 30536 KB Output is correct
18 Correct 18 ms 30544 KB Output is correct
19 Correct 688 ms 54160 KB Output is correct
20 Correct 632 ms 54212 KB Output is correct
21 Correct 976 ms 54212 KB Output is correct
22 Correct 780 ms 54148 KB Output is correct
23 Correct 238 ms 54088 KB Output is correct
24 Correct 269 ms 54088 KB Output is correct
25 Correct 807 ms 58340 KB Output is correct
26 Correct 639 ms 62032 KB Output is correct
27 Correct 575 ms 77384 KB Output is correct
28 Correct 777 ms 93256 KB Output is correct
29 Correct 777 ms 92144 KB Output is correct
30 Correct 538 ms 77384 KB Output is correct
31 Correct 578 ms 77384 KB Output is correct
32 Correct 822 ms 79944 KB Output is correct
33 Correct 1204 ms 77676 KB Output is correct
34 Correct 583 ms 77384 KB Output is correct

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 34384 KB Output is correct
2 Correct 18 ms 34384 KB Output is correct
3 Correct 14 ms 30544 KB Output is correct
4 Correct 16 ms 34396 KB Output is correct
5 Correct 11 ms 34384 KB Output is correct
6 Correct 12 ms 34548 KB Output is correct
7 Correct 16 ms 30544 KB Output is correct
8 Correct 13 ms 34384 KB Output is correct
9 Correct 18 ms 30544 KB Output is correct
10 Correct 17 ms 30544 KB Output is correct
11 Correct 17 ms 30712 KB Output is correct
12 Correct 15 ms 30544 KB Output is correct
13 Correct 14 ms 30544 KB Output is correct
14 Correct 22 ms 30612 KB Output is correct
15 Correct 16 ms 30544 KB Output is correct
16 Correct 17 ms 30544 KB Output is correct
17 Correct 22 ms 30536 KB Output is correct
18 Correct 18 ms 30544 KB Output is correct
19 Correct 17 ms 30544 KB Output is correct
20 Correct 17 ms 30544 KB Output is correct
21 Correct 25 ms 30800 KB Output is correct
22 Correct 25 ms 30800 KB Output is correct
23 Correct 21 ms 30800 KB Output is correct
24 Correct 21 ms 30964 KB Output is correct
25 Correct 19 ms 30972 KB Output is correct
26 Correct 21 ms 30808 KB Output is correct
27 Correct 17 ms 30800 KB Output is correct
28 Correct 19 ms 30800 KB Output is correct
29 Correct 20 ms 30800 KB Output is correct
30 Correct 20 ms 31120 KB Output is correct
31 Correct 22 ms 30812 KB Output is correct
32 Correct 23 ms 30800 KB Output is correct
33 Correct 19 ms 30800 KB Output is correct
34 Correct 23 ms 30800 KB Output is correct
35 Correct 19 ms 30800 KB Output is correct
36 Correct 17 ms 30800 KB Output is correct
37 Correct 19 ms 30800 KB Output is correct
38 Correct 21 ms 30800 KB Output is correct
39 Correct 688 ms 54160 KB Output is correct
40 Correct 632 ms 54212 KB Output is correct
41 Correct 976 ms 54212 KB Output is correct
42 Correct 780 ms 54148 KB Output is correct
43 Correct 238 ms 54088 KB Output is correct
44 Correct 269 ms 54088 KB Output is correct
45 Correct 807 ms 58340 KB Output is correct
46 Correct 639 ms 62032 KB Output is correct
47 Correct 575 ms 77384 KB Output is correct
48 Correct 777 ms 93256 KB Output is correct
49 Correct 777 ms 92144 KB Output is correct
50 Correct 538 ms 77384 KB Output is correct
51 Correct 578 ms 77384 KB Output is correct
52 Correct 822 ms 79944 KB Output is correct
53 Correct 1204 ms 77676 KB Output is correct
54 Correct 583 ms 77384 KB Output is correct
55 Correct 52 ms 32848 KB Output is correct
56 Correct 54 ms 32848 KB Output is correct
57 Correct 570 ms 54088 KB Output is correct
58 Correct 137 ms 54096 KB Output is correct
59 Correct 634 ms 62048 KB Output is correct
60 Execution timed out 3071 ms 92488 KB Time limit exceeded
61 Halted 0 ms 0 KB -