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답안 #653026

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
653026 2022-10-25T13:06:38 Z beaconmc 경주 (Race) (IOI11_race) C++14
100 / 100
 1049 ms 64912 KB 
#include <bits/stdc++.h>
#include "race.h"
#define ll long long
#define FOR(i,x,y) for(ll i=x; i<y; i++)

using namespace std;


bool r[300000];
vector<vector<ll>> edges[300000];

ll sub[300000];
ll n,m,root,k;
vector<vector<ll>> twosum;
ll ans = 1000000000;

ll dfs(ll a, ll p){

	sub[a] = 1;
	for (auto& i : edges[a]){
		if (i[0]!=p && !r[i[0]]) sub[a] += dfs(i[0], a);
	}
	return sub[a];
}

void dfs2(ll a, ll p, ll v, ll num, ll col){
	for (auto& i : edges[a]){
		if (i[0]!=p && !r[i[0]]) dfs2(i[0], a, v+i[1], num+1, col);
	}
	twosum.push_back({v, num, col});
}



ll centroid(ll a, ll sz, ll p){

	for (auto&i : edges[a]){
		if (i[0]!=p && !r[i[0]] && sub[i[0]]*2 > sz){
			return centroid(i[0], sz, a);
		}
	}
	return a;
}

void decomp(ll a, ll p){
	ll c = centroid(a, dfs(a, -1), -1);

	twosum.clear();

	ll col = 0;
	for (auto&i : edges[c]){
		if (!r[i[0]]) dfs2(i[0], c, i[1],1,col);
		twosum.push_back({0,0,col});
		col++;
	}


	sort(twosum.begin(), twosum.end());
	ll lo = 0;
	ll hi = twosum.size()-1;

	while (lo<=hi){
		if (twosum[lo][0] + twosum[hi][0] > k){
			hi--;
		}else if (twosum[lo][0] + twosum[hi][0] == k){
			if (twosum[lo][2] == twosum[hi][2]){
				if (twosum[hi][0] != twosum[hi-1][0]){
					lo++;
					continue;
				}
				hi--;
				continue;
			}else{
				ans = min(ans, twosum[lo][1] + twosum[hi][1]);
				hi --;
			}
		}else if (twosum[lo][0] + twosum[hi][0] < k){
			lo++;
		}
	}


	r[c] = 1;
	for (auto&i : edges[c]){
		if (!r[i[0]]) decomp(i[0], c);
	}
}




int best_path(int N, int K, int H[][2], int L[])
{
	n = N;
	k = K;
	FOR(i,0,n-1){
		ll a,b,c;
		a = H[i][0];
		b = H[i][1];
		c = L[i];
		edges[a].push_back({b,c});
		edges[b].push_back({a,c});
	}
	decomp(0,-1);
	if (ans == 1000000000) ans = -1;
	return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 5 ms 7360 KB Output is correct
6 Correct 4 ms 7364 KB Output is correct
7 Correct 5 ms 7364 KB Output is correct
8 Correct 5 ms 7380 KB Output is correct
9 Correct 4 ms 7360 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 5 ms 7364 KB Output is correct
13 Correct 5 ms 7364 KB Output is correct
14 Correct 5 ms 7360 KB Output is correct
15 Correct 5 ms 7380 KB Output is correct
16 Correct 5 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 5 ms 7380 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 5 ms 7360 KB Output is correct
6 Correct 4 ms 7364 KB Output is correct
7 Correct 5 ms 7364 KB Output is correct
8 Correct 5 ms 7380 KB Output is correct
9 Correct 4 ms 7360 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 5 ms 7364 KB Output is correct
13 Correct 5 ms 7364 KB Output is correct
14 Correct 5 ms 7360 KB Output is correct
15 Correct 5 ms 7380 KB Output is correct
16 Correct 5 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 5 ms 7380 KB Output is correct
19 Correct 5 ms 7364 KB Output is correct
20 Correct 4 ms 7364 KB Output is correct
21 Correct 5 ms 7508 KB Output is correct
22 Correct 6 ms 7508 KB Output is correct
23 Correct 6 ms 7508 KB Output is correct
24 Correct 6 ms 7500 KB Output is correct
25 Correct 7 ms 7508 KB Output is correct
26 Correct 6 ms 7504 KB Output is correct
27 Correct 5 ms 7504 KB Output is correct
28 Correct 6 ms 7508 KB Output is correct
29 Correct 8 ms 7592 KB Output is correct
30 Correct 5 ms 7508 KB Output is correct
31 Correct 5 ms 7504 KB Output is correct
32 Correct 5 ms 7508 KB Output is correct
33 Correct 6 ms 7500 KB Output is correct
34 Correct 5 ms 7508 KB Output is correct
35 Correct 5 ms 7508 KB Output is correct
36 Correct 5 ms 7508 KB Output is correct
37 Correct 5 ms 7508 KB Output is correct
38 Correct 6 ms 7496 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 5 ms 7360 KB Output is correct
6 Correct 4 ms 7364 KB Output is correct
7 Correct 5 ms 7364 KB Output is correct
8 Correct 5 ms 7380 KB Output is correct
9 Correct 4 ms 7360 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 5 ms 7364 KB Output is correct
13 Correct 5 ms 7364 KB Output is correct
14 Correct 5 ms 7360 KB Output is correct
15 Correct 5 ms 7380 KB Output is correct
16 Correct 5 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 5 ms 7380 KB Output is correct
19 Correct 412 ms 28960 KB Output is correct
20 Correct 401 ms 29116 KB Output is correct
21 Correct 424 ms 29056 KB Output is correct
22 Correct 353 ms 28984 KB Output is correct
23 Correct 330 ms 29668 KB Output is correct
24 Correct 189 ms 28092 KB Output is correct
25 Correct 356 ms 35812 KB Output is correct
26 Correct 273 ms 35916 KB Output is correct
27 Correct 435 ms 50804 KB Output is correct
28 Correct 865 ms 64684 KB Output is correct
29 Correct 843 ms 64532 KB Output is correct
30 Correct 440 ms 50644 KB Output is correct
31 Correct 438 ms 50700 KB Output is correct
32 Correct 535 ms 50696 KB Output is correct
33 Correct 682 ms 50540 KB Output is correct
34 Correct 669 ms 51240 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 5 ms 7360 KB Output is correct
6 Correct 4 ms 7364 KB Output is correct
7 Correct 5 ms 7364 KB Output is correct
8 Correct 5 ms 7380 KB Output is correct
9 Correct 4 ms 7360 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 5 ms 7364 KB Output is correct
13 Correct 5 ms 7364 KB Output is correct
14 Correct 5 ms 7360 KB Output is correct
15 Correct 5 ms 7380 KB Output is correct
16 Correct 5 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 5 ms 7380 KB Output is correct
19 Correct 5 ms 7364 KB Output is correct
20 Correct 4 ms 7364 KB Output is correct
21 Correct 5 ms 7508 KB Output is correct
22 Correct 6 ms 7508 KB Output is correct
23 Correct 6 ms 7508 KB Output is correct
24 Correct 6 ms 7500 KB Output is correct
25 Correct 7 ms 7508 KB Output is correct
26 Correct 6 ms 7504 KB Output is correct
27 Correct 5 ms 7504 KB Output is correct
28 Correct 6 ms 7508 KB Output is correct
29 Correct 8 ms 7592 KB Output is correct
30 Correct 5 ms 7508 KB Output is correct
31 Correct 5 ms 7504 KB Output is correct
32 Correct 5 ms 7508 KB Output is correct
33 Correct 6 ms 7500 KB Output is correct
34 Correct 5 ms 7508 KB Output is correct
35 Correct 5 ms 7508 KB Output is correct
36 Correct 5 ms 7508 KB Output is correct
37 Correct 5 ms 7508 KB Output is correct
38 Correct 6 ms 7496 KB Output is correct
39 Correct 412 ms 28960 KB Output is correct
40 Correct 401 ms 29116 KB Output is correct
41 Correct 424 ms 29056 KB Output is correct
42 Correct 353 ms 28984 KB Output is correct
43 Correct 330 ms 29668 KB Output is correct
44 Correct 189 ms 28092 KB Output is correct
45 Correct 356 ms 35812 KB Output is correct
46 Correct 273 ms 35916 KB Output is correct
47 Correct 435 ms 50804 KB Output is correct
48 Correct 865 ms 64684 KB Output is correct
49 Correct 843 ms 64532 KB Output is correct
50 Correct 440 ms 50644 KB Output is correct
51 Correct 438 ms 50700 KB Output is correct
52 Correct 535 ms 50696 KB Output is correct
53 Correct 682 ms 50540 KB Output is correct
54 Correct 669 ms 51240 KB Output is correct
55 Correct 21 ms 9624 KB Output is correct
56 Correct 24 ms 9552 KB Output is correct
57 Correct 278 ms 29480 KB Output is correct
58 Correct 108 ms 33104 KB Output is correct
59 Correct 296 ms 35800 KB Output is correct
60 Correct 1049 ms 64404 KB Output is correct
61 Correct 499 ms 50976 KB Output is correct
62 Correct 514 ms 50864 KB Output is correct
63 Correct 594 ms 50732 KB Output is correct
64 Correct 1022 ms 51448 KB Output is correct
65 Correct 847 ms 51880 KB Output is correct
66 Correct 900 ms 64912 KB Output is correct
67 Correct 322 ms 60256 KB Output is correct
68 Correct 556 ms 50256 KB Output is correct
69 Correct 555 ms 50724 KB Output is correct
70 Correct 566 ms 48508 KB Output is correct