oj.uz

답안 #298029

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
298029 2020-09-12T09:59:01 Z miss_robot 경주 (Race) (IOI11_race) C++14
100 / 100
 731 ms 52444 KB 
#include "race.h"
#include <bits/stdc++.h>

#pragma GCC optimize("O3")
#define int long long

using namespace std;

int INF = numeric_limits<int>::max()/4, best[1000001];

void dfs(int u, int p, vector<int>& st, vector<int>& active, vector< vector<pair<int, int> > >& g){
	st[u] = 1;
	for(auto &t : g[u]){
		if(!active[t.first] || t.first == p) continue;
		dfs(t.first, u, st, active, g);
		st[u] += st[t.first];
	}
}

int fnd(int u, int p, int n, vector<int>& st, vector<int>& active, vector< vector<pair<int, int> > >& g){
	for(auto &t : g[u]){
		if(!active[t.first] || t.first == p) continue;
		if(st[t.first] > n/2) return fnd(t.first, u, n, st, active, g);
	}
	return u;
}

void sum(int u, int p, int d, int num, vector< pair<int, int> >& temp, vector<int>& active, vector< vector< pair<int, int> > >& g){
	temp.push_back({num++, d});
	for(auto& t : g[u]){
		if(t.first == p || !active[t.first]) continue;
		sum(t.first, u, d+t.second, num, temp, active, g);
	}
}

void solve(int u, int k, vector<int>& st, vector<int>& active, vector< vector< pair<int, int> > >& g, int& b){
	dfs(u, u, st, active, g);
	u = fnd(u, u, st[u], st, active, g);
	vector<int> ers;
	vector< pair<int, int> > temp;
	for(auto &t : g[u]){
		if(!active[t.first]) continue;
		temp.clear();
		sum(t.first, u, t.second, 1, temp, active, g);
		for(auto &q : temp){
			if(q.second > k) continue;
			else b = min(b, q.first + best[k-q.second]);
		}
		for(auto &q : temp) if(q.second <= k) best[q.second] = min(best[q.second], q.first), ers.push_back(q.second);
	}
	for(int &x : ers) best[x] = INF;
	active[u] = 0;
	for(int i = 0; i < (int)g[u].size(); i++)
		if(active[g[u][i].first] && st[g[u][i].first] > 1)
			solve(g[u][i].first, k, st, active, g, b);
}

signed best_path(signed N, signed K, signed H[][2], signed L[]){
	int n = N, k = K, b = INF, u, v, w;
	vector< vector< pair<int, int> > > g(n);
	for(int i = 1; i < n; i++){
		u = H[i-1][0], v = H[i-1][1], w = L[i-1];
		g[u].push_back({v, w}), g[v].push_back({u, w});
	}
	for(int i = 1; i <= k; i++) best[i] = INF;
	vector<int> active(n, 1), st(n);
	solve(0, k, st, active, g, b);
	return (b==INF?-1:b);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 512 KB Output is correct
22 Correct 6 ms 7680 KB Output is correct
23 Correct 5 ms 6400 KB Output is correct
24 Correct 5 ms 7296 KB Output is correct
25 Correct 6 ms 7040 KB Output is correct
26 Correct 3 ms 3072 KB Output is correct
27 Correct 5 ms 6784 KB Output is correct
28 Correct 3 ms 2048 KB Output is correct
29 Correct 3 ms 3072 KB Output is correct
30 Correct 4 ms 3328 KB Output is correct
31 Correct 5 ms 5632 KB Output is correct
32 Correct 5 ms 6016 KB Output is correct
33 Correct 5 ms 6656 KB Output is correct
34 Correct 4 ms 5120 KB Output is correct
35 Correct 5 ms 6784 KB Output is correct
36 Correct 6 ms 7808 KB Output is correct
37 Correct 5 ms 6656 KB Output is correct
38 Correct 4 ms 4480 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 249 ms 13588 KB Output is correct
20 Correct 253 ms 13680 KB Output is correct
21 Correct 231 ms 14320 KB Output is correct
22 Correct 211 ms 14696 KB Output is correct
23 Correct 168 ms 13680 KB Output is correct
24 Correct 101 ms 12156 KB Output is correct
25 Correct 227 ms 20464 KB Output is correct
26 Correct 174 ms 22704 KB Output is correct
27 Correct 274 ms 24316 KB Output is correct
28 Correct 661 ms 41704 KB Output is correct
29 Correct 680 ms 40556 KB Output is correct
30 Correct 266 ms 23672 KB Output is correct
31 Correct 275 ms 23800 KB Output is correct
32 Correct 363 ms 23800 KB Output is correct
33 Correct 490 ms 26260 KB Output is correct
34 Correct 454 ms 25580 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 512 KB Output is correct
22 Correct 6 ms 7680 KB Output is correct
23 Correct 5 ms 6400 KB Output is correct
24 Correct 5 ms 7296 KB Output is correct
25 Correct 6 ms 7040 KB Output is correct
26 Correct 3 ms 3072 KB Output is correct
27 Correct 5 ms 6784 KB Output is correct
28 Correct 3 ms 2048 KB Output is correct
29 Correct 3 ms 3072 KB Output is correct
30 Correct 4 ms 3328 KB Output is correct
31 Correct 5 ms 5632 KB Output is correct
32 Correct 5 ms 6016 KB Output is correct
33 Correct 5 ms 6656 KB Output is correct
34 Correct 4 ms 5120 KB Output is correct
35 Correct 5 ms 6784 KB Output is correct
36 Correct 6 ms 7808 KB Output is correct
37 Correct 5 ms 6656 KB Output is correct
38 Correct 4 ms 4480 KB Output is correct
39 Correct 249 ms 13588 KB Output is correct
40 Correct 253 ms 13680 KB Output is correct
41 Correct 231 ms 14320 KB Output is correct
42 Correct 211 ms 14696 KB Output is correct
43 Correct 168 ms 13680 KB Output is correct
44 Correct 101 ms 12156 KB Output is correct
45 Correct 227 ms 20464 KB Output is correct
46 Correct 174 ms 22704 KB Output is correct
47 Correct 274 ms 24316 KB Output is correct
48 Correct 661 ms 41704 KB Output is correct
49 Correct 680 ms 40556 KB Output is correct
50 Correct 266 ms 23672 KB Output is correct
51 Correct 275 ms 23800 KB Output is correct
52 Correct 363 ms 23800 KB Output is correct
53 Correct 490 ms 26260 KB Output is correct
54 Correct 454 ms 25580 KB Output is correct
55 Correct 12 ms 1792 KB Output is correct
56 Correct 13 ms 1792 KB Output is correct
57 Correct 121 ms 14692 KB Output is correct
58 Correct 45 ms 13032 KB Output is correct
59 Correct 154 ms 24112 KB Output is correct
60 Correct 696 ms 52444 KB Output is correct
61 Correct 290 ms 25096 KB Output is correct
62 Correct 288 ms 34432 KB Output is correct
63 Correct 379 ms 34304 KB Output is correct
64 Correct 729 ms 34456 KB Output is correct
65 Correct 518 ms 27756 KB Output is correct
66 Correct 731 ms 49036 KB Output is correct
67 Correct 171 ms 34784 KB Output is correct
68 Correct 389 ms 35948 KB Output is correct
69 Correct 370 ms 36584 KB Output is correct
70 Correct 351 ms 35304 KB Output is correct