oj.uz

답안 #1022558

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1022558 2024-07-13T17:42:23 Z socpite 경주 (Race) (IOI11_race) C++14
100 / 100
 352 ms 59220 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;

const int maxn = 4e5+5;

map<long long, int> mp;

int sz[maxn];
int dep1[maxn];
long long dep2[maxn];
vector<pair<int, int>> g[maxn];

void add(long long val, int dep){
	if(mp.find(val) != mp.end())mp[val] = min(mp[val], dep);
	else mp[val] = dep;
}

int query(long long val){
	if(mp.find(val) == mp.end())return maxn;
	else return mp[val];
}

// k = dep[a] + dep[b] - 2*dep[lca] => dep[b] = k - dep[a] + 2*dep[lca];

void pre_dfs(int x, int p){
	sz[x] = 1;
	for(auto v: g[x]){
		if(v.first == p)continue;
		dep1[v.first] = dep1[x] + 1;
		dep2[v.first] = dep2[x] + v.second;
		pre_dfs(v.first, x);
		sz[x] += sz[v.first];
	}
}

int dfs_query(int x, int p, long long coeff){
	int re = query(coeff - dep2[x]) + dep1[x];
	for(auto v: g[x]){
		if(v.first == p)continue;
		re = min(re, dfs_query(v.first, x, coeff));
	}
	return re;
}

void dfs_add(int x, int p){
	add(dep2[x], dep1[x]);
	for(auto v: g[x]){
		if(v.first == p)continue;
		dfs_add(v.first, x);
	}
}

int dfs(int x, int p, int k){
	sz[x] = 1;
	int ans = maxn, bg = -1;
	for(auto v: g[x]){
		if(v.first == p)continue;
		if(bg == -1 || sz[bg] < sz[v.first])bg = v.first;
	}
	for(auto v: g[x]){
		if(v.first == p || v.first == bg)continue;
		ans = min(ans, dfs(v.first, x, k));
		mp.clear();
	}
	if(bg != -1)ans = min(ans, dfs(bg, x, k));
	for(auto v: g[x]){
		if(v.first == p || v.first == bg)continue;
		ans = min(ans, dfs_query(v.first, x, 2*dep2[x] + k) - 2*dep1[x]);
		dfs_add(v.first, x);
	}
	ans = min(ans, query(dep2[x] + k) - dep1[x]);
	add(dep2[x], dep1[x]);
	return ans;
}


int best_path(int N, int K, int H[][2], int L[])
{
	mp.clear();
	dep1[0] = 0;
	dep2[0] = 0;
	for(int i = 0; i < N; i++)g[i].clear();
	for(int i = 0; i < N-1; i++){
		g[H[i][0]].push_back({H[i][1], L[i]});
		g[H[i][1]].push_back({H[i][0], L[i]});
	}
	pre_dfs(0, -1);
	int ans = dfs(0, -1, K);
	return ans > N ? -1 : ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 4 ms 11356 KB Output is correct
4 Correct 4 ms 11356 KB Output is correct
5 Correct 3 ms 11472 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 3 ms 11356 KB Output is correct
10 Correct 4 ms 11356 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 4 ms 11352 KB Output is correct
13 Correct 3 ms 11356 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 3 ms 11356 KB Output is correct
16 Correct 5 ms 9820 KB Output is correct
17 Correct 4 ms 15196 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 4 ms 11356 KB Output is correct
4 Correct 4 ms 11356 KB Output is correct
5 Correct 3 ms 11472 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 3 ms 11356 KB Output is correct
10 Correct 4 ms 11356 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 4 ms 11352 KB Output is correct
13 Correct 3 ms 11356 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 3 ms 11356 KB Output is correct
16 Correct 5 ms 9820 KB Output is correct
17 Correct 4 ms 15196 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 3 ms 11356 KB Output is correct
20 Correct 3 ms 11356 KB Output is correct
21 Correct 5 ms 11356 KB Output is correct
22 Correct 4 ms 11608 KB Output is correct
23 Correct 4 ms 11356 KB Output is correct
24 Correct 4 ms 11448 KB Output is correct
25 Correct 4 ms 11356 KB Output is correct
26 Correct 5 ms 11356 KB Output is correct
27 Correct 3 ms 11356 KB Output is correct
28 Correct 4 ms 11356 KB Output is correct
29 Correct 4 ms 11356 KB Output is correct
30 Correct 4 ms 11356 KB Output is correct
31 Correct 4 ms 11352 KB Output is correct
32 Correct 3 ms 11356 KB Output is correct
33 Correct 4 ms 11356 KB Output is correct
34 Correct 3 ms 11356 KB Output is correct
35 Correct 3 ms 11356 KB Output is correct
36 Correct 4 ms 11444 KB Output is correct
37 Correct 4 ms 11352 KB Output is correct
38 Correct 4 ms 11356 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 4 ms 11356 KB Output is correct
4 Correct 4 ms 11356 KB Output is correct
5 Correct 3 ms 11472 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 3 ms 11356 KB Output is correct
10 Correct 4 ms 11356 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 4 ms 11352 KB Output is correct
13 Correct 3 ms 11356 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 3 ms 11356 KB Output is correct
16 Correct 5 ms 9820 KB Output is correct
17 Correct 4 ms 15196 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 97 ms 17968 KB Output is correct
20 Correct 94 ms 18868 KB Output is correct
21 Correct 97 ms 18592 KB Output is correct
22 Correct 87 ms 19272 KB Output is correct
23 Correct 140 ms 19540 KB Output is correct
24 Correct 80 ms 19280 KB Output is correct
25 Correct 54 ms 24400 KB Output is correct
26 Correct 36 ms 28876 KB Output is correct
27 Correct 109 ms 26232 KB Output is correct
28 Correct 159 ms 59220 KB Output is correct
29 Correct 161 ms 57672 KB Output is correct
30 Correct 141 ms 26620 KB Output is correct
31 Correct 119 ms 26704 KB Output is correct
32 Correct 130 ms 26708 KB Output is correct
33 Correct 152 ms 25680 KB Output is correct
34 Correct 250 ms 38236 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 4 ms 11356 KB Output is correct
4 Correct 4 ms 11356 KB Output is correct
5 Correct 3 ms 11472 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 3 ms 11356 KB Output is correct
10 Correct 4 ms 11356 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 4 ms 11352 KB Output is correct
13 Correct 3 ms 11356 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 3 ms 11356 KB Output is correct
16 Correct 5 ms 9820 KB Output is correct
17 Correct 4 ms 15196 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 3 ms 11356 KB Output is correct
20 Correct 3 ms 11356 KB Output is correct
21 Correct 5 ms 11356 KB Output is correct
22 Correct 4 ms 11608 KB Output is correct
23 Correct 4 ms 11356 KB Output is correct
24 Correct 4 ms 11448 KB Output is correct
25 Correct 4 ms 11356 KB Output is correct
26 Correct 5 ms 11356 KB Output is correct
27 Correct 3 ms 11356 KB Output is correct
28 Correct 4 ms 11356 KB Output is correct
29 Correct 4 ms 11356 KB Output is correct
30 Correct 4 ms 11356 KB Output is correct
31 Correct 4 ms 11352 KB Output is correct
32 Correct 3 ms 11356 KB Output is correct
33 Correct 4 ms 11356 KB Output is correct
34 Correct 3 ms 11356 KB Output is correct
35 Correct 3 ms 11356 KB Output is correct
36 Correct 4 ms 11444 KB Output is correct
37 Correct 4 ms 11352 KB Output is correct
38 Correct 4 ms 11356 KB Output is correct
39 Correct 97 ms 17968 KB Output is correct
40 Correct 94 ms 18868 KB Output is correct
41 Correct 97 ms 18592 KB Output is correct
42 Correct 87 ms 19272 KB Output is correct
43 Correct 140 ms 19540 KB Output is correct
44 Correct 80 ms 19280 KB Output is correct
45 Correct 54 ms 24400 KB Output is correct
46 Correct 36 ms 28876 KB Output is correct
47 Correct 109 ms 26232 KB Output is correct
48 Correct 159 ms 59220 KB Output is correct
49 Correct 161 ms 57672 KB Output is correct
50 Correct 141 ms 26620 KB Output is correct
51 Correct 119 ms 26704 KB Output is correct
52 Correct 130 ms 26708 KB Output is correct
53 Correct 152 ms 25680 KB Output is correct
54 Correct 250 ms 38236 KB Output is correct
55 Correct 15 ms 12376 KB Output is correct
56 Correct 9 ms 11868 KB Output is correct
57 Correct 59 ms 18136 KB Output is correct
58 Correct 32 ms 19148 KB Output is correct
59 Correct 63 ms 35188 KB Output is correct
60 Correct 141 ms 58192 KB Output is correct
61 Correct 142 ms 27728 KB Output is correct
62 Correct 107 ms 26612 KB Output is correct
63 Correct 147 ms 26664 KB Output is correct
64 Correct 352 ms 31316 KB Output is correct
65 Correct 333 ms 39748 KB Output is correct
66 Correct 155 ms 52244 KB Output is correct
67 Correct 73 ms 28100 KB Output is correct
68 Correct 197 ms 37460 KB Output is correct
69 Correct 198 ms 35428 KB Output is correct
70 Correct 192 ms 36688 KB Output is correct