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답안 #702080

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
702080 2023-02-22T17:14:28 Z sysia 경주 (Race) (IOI11_race) C++17
100 / 100
 591 ms 54560 KB 
//Sylwia Sapkowska
#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
#include "race.h"
using namespace std;
typedef long long ll;
typedef pair<int, ll> T;
const ll oo = 1e18;

int best_path(int n, int k, int H[][2], int L[]){
	vector<vector<T>>g(n+1);
	for (int i = 0; i<n-1; i++){
		H[i][0]++;H[i][1]++;
	}
	for (int i = 0; i<n-1; i++){
		g[H[i][0]].emplace_back(H[i][1], L[i]);
		g[H[i][1]].emplace_back(H[i][0], L[i]);
	}
	vector<int>used(n+1), sz(n+1);
	function<int(int, int)>dfssize = [&](int v, int pa){
		sz[v] = 1;
		for (auto [x, c]: g[v]){
			if (x == pa || used[x]) continue;
			sz[v] += dfssize(x, v);
		}
		return sz[v];
	};
	function<int(int, int, int)>get_centroid = [&](int v, int pa, int ms){
		for (auto [x, c]: g[v]){
			if (x == pa || used[x]) continue;
			if (sz[x] * 2 > ms) return get_centroid(x, v, ms);
		}
		return v;
	};
	ll ans = oo;
	vector<ll>depth(n+1), sum(n+1), mn(k+1, oo);
	mn[0] = 0;
	vector<int>now, to_clear;
	function<void(int)>centroid = [&](int v){
		v = get_centroid(v, v, dfssize(v, v));
		function<void(int, int)>dfs = [&](int u, int pa){
			now.emplace_back(u);
			for (auto [x, c]: g[u]){
				if (x == pa || used[x]) continue;
				depth[x] = depth[u]+1;
				sum[x] = sum[u]+c;
				dfs(x, u);
			}
		};
		for (auto [x, c]: g[v]){
			if (used[x]) continue;
			now.clear();
			depth[x] = 1;
			sum[x] = c;
			dfs(x, v);
			for (auto u: now){
				if (k >= sum[u]) {
					ans = min(ans, depth[u] + mn[k-sum[u]]);
				}
			}
			for (auto u: now){
				if (sum[u] <= k){
					mn[sum[u]] = min(mn[sum[u]], depth[u]);
					to_clear.emplace_back(sum[u]);
				}
				depth[u] = 0;
				sum[u] = 0;
			}
		}
		for (auto x: to_clear) mn[x] = oo;
		to_clear.clear();
		used[v] = 1;
		for (auto [x, c]: g[v]){
			if (!used[x]){
				centroid(x);
			}
		}
	};
	centroid(1);
	if (ans == oo) ans = -1;
	return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 4 ms 7636 KB Output is correct
23 Correct 4 ms 6356 KB Output is correct
24 Correct 4 ms 7124 KB Output is correct
25 Correct 4 ms 6976 KB Output is correct
26 Correct 2 ms 3004 KB Output is correct
27 Correct 3 ms 6612 KB Output is correct
28 Correct 2 ms 2004 KB Output is correct
29 Correct 2 ms 2900 KB Output is correct
30 Correct 3 ms 3284 KB Output is correct
31 Correct 3 ms 5568 KB Output is correct
32 Correct 3 ms 5972 KB Output is correct
33 Correct 4 ms 6484 KB Output is correct
34 Correct 3 ms 5076 KB Output is correct
35 Correct 4 ms 6740 KB Output is correct
36 Correct 4 ms 7636 KB Output is correct
37 Correct 3 ms 6584 KB Output is correct
38 Correct 3 ms 4308 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 190 ms 13008 KB Output is correct
20 Correct 185 ms 13000 KB Output is correct
21 Correct 180 ms 13184 KB Output is correct
22 Correct 155 ms 13492 KB Output is correct
23 Correct 141 ms 13416 KB Output is correct
24 Correct 75 ms 12536 KB Output is correct
25 Correct 184 ms 18340 KB Output is correct
26 Correct 129 ms 23932 KB Output is correct
27 Correct 205 ms 25604 KB Output is correct
28 Correct 528 ms 47048 KB Output is correct
29 Correct 523 ms 45364 KB Output is correct
30 Correct 203 ms 25672 KB Output is correct
31 Correct 201 ms 25724 KB Output is correct
32 Correct 285 ms 25920 KB Output is correct
33 Correct 372 ms 25140 KB Output is correct
34 Correct 372 ms 25944 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 4 ms 7636 KB Output is correct
23 Correct 4 ms 6356 KB Output is correct
24 Correct 4 ms 7124 KB Output is correct
25 Correct 4 ms 6976 KB Output is correct
26 Correct 2 ms 3004 KB Output is correct
27 Correct 3 ms 6612 KB Output is correct
28 Correct 2 ms 2004 KB Output is correct
29 Correct 2 ms 2900 KB Output is correct
30 Correct 3 ms 3284 KB Output is correct
31 Correct 3 ms 5568 KB Output is correct
32 Correct 3 ms 5972 KB Output is correct
33 Correct 4 ms 6484 KB Output is correct
34 Correct 3 ms 5076 KB Output is correct
35 Correct 4 ms 6740 KB Output is correct
36 Correct 4 ms 7636 KB Output is correct
37 Correct 3 ms 6584 KB Output is correct
38 Correct 3 ms 4308 KB Output is correct
39 Correct 190 ms 13008 KB Output is correct
40 Correct 185 ms 13000 KB Output is correct
41 Correct 180 ms 13184 KB Output is correct
42 Correct 155 ms 13492 KB Output is correct
43 Correct 141 ms 13416 KB Output is correct
44 Correct 75 ms 12536 KB Output is correct
45 Correct 184 ms 18340 KB Output is correct
46 Correct 129 ms 23932 KB Output is correct
47 Correct 205 ms 25604 KB Output is correct
48 Correct 528 ms 47048 KB Output is correct
49 Correct 523 ms 45364 KB Output is correct
50 Correct 203 ms 25672 KB Output is correct
51 Correct 201 ms 25724 KB Output is correct
52 Correct 285 ms 25920 KB Output is correct
53 Correct 372 ms 25140 KB Output is correct
54 Correct 372 ms 25944 KB Output is correct
55 Correct 10 ms 1568 KB Output is correct
56 Correct 11 ms 1620 KB Output is correct
57 Correct 108 ms 13692 KB Output is correct
58 Correct 40 ms 12828 KB Output is correct
59 Correct 134 ms 25400 KB Output is correct
60 Correct 591 ms 54560 KB Output is correct
61 Correct 209 ms 26200 KB Output is correct
62 Correct 221 ms 34748 KB Output is correct
63 Correct 295 ms 34684 KB Output is correct
64 Correct 546 ms 31224 KB Output is correct
65 Correct 405 ms 26804 KB Output is correct
66 Correct 574 ms 49760 KB Output is correct
67 Correct 134 ms 34480 KB Output is correct
68 Correct 300 ms 34780 KB Output is correct
69 Correct 292 ms 34648 KB Output is correct
70 Correct 274 ms 33388 KB Output is correct