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답안 #671646

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
671646 2022-12-13T12:08:08 Z shrimb 경주 (Race) (IOI11_race) C++17
100 / 100
 432 ms 101196 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;

vector<pair<int,int>>adj[200001];
int dsu[200001],sz[200001];
map<long long,int> store[200001];
long long sum[200001];
long long ans = INT_MAX, K;

int Find(int x){
    return x == dsu[x] ? x : dsu[x] = Find(dsu[x]);
}

void Unite(int a, int b, long long cur_k, int cur_depth){
    a = Find(a); b = Find(b);
    if(sz[a] > sz[b]) swap(a,b);
    sz[b] += sz[a];
    dsu[a] = b;
    for(auto &s: store[a]){
        if(store[b].count(cur_k - s.first)){
            ans = min(ans, (long long)s.second - cur_depth + store[b][cur_k - s.first] - cur_depth);
        }
    }
    for(auto &s: store[a]){
        if(!store[b].count(s.first) or store[b][s.first] > s.second){
            store[b][s.first] = s.second;
        }
    }
}
void dfs(int x, int par, int depth){
    for(auto s: adj[x]){
        if(s.first != par){
            sum[s.first] = s.second + sum[x];
            dfs(s.first, x, depth + 1);
        }
    }
    store[x][sum[x]] = depth;
    for(auto s: adj[x]){
        if(s.first != par){
            Unite(x, s.first, 2ll * sum[x] + K, depth);
        }
    }
    int b = Find(x);
    if(store[b].count(sum[x] + K) != 0) ans = min(ans, (long long)store[b][sum[x] + K]  - depth);
}
signed best_path(signed n, signed k, signed h[][2], signed l[]){
    for (int i = 1 ; i <= n ; i++) sz[i] = 1, dsu[i] = i;
    ans = INT_MAX;
    for(int i = 0; i < n - 1; i++){
        h[i][0]++; h[i][1]++;
        adj[h[i][0]].push_back({h[i][1], l[i]});
        adj[h[i][1]].push_back({h[i][0], l[i]});
    }
    K = k;
    dfs(1, 0, 1);

    if(ans == INT_MAX) ans = -1;
  return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14384 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14344 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14440 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14456 KB Output is correct
14 Correct 7 ms 14372 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 7 ms 14452 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14384 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14344 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14440 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14456 KB Output is correct
14 Correct 7 ms 14372 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 7 ms 14452 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14536 KB Output is correct
21 Correct 8 ms 14632 KB Output is correct
22 Correct 8 ms 14676 KB Output is correct
23 Correct 8 ms 14676 KB Output is correct
24 Correct 9 ms 14676 KB Output is correct
25 Correct 8 ms 14692 KB Output is correct
26 Correct 8 ms 14676 KB Output is correct
27 Correct 8 ms 14572 KB Output is correct
28 Correct 8 ms 14676 KB Output is correct
29 Correct 8 ms 14676 KB Output is correct
30 Correct 8 ms 14676 KB Output is correct
31 Correct 8 ms 14676 KB Output is correct
32 Correct 9 ms 14612 KB Output is correct
33 Correct 9 ms 14684 KB Output is correct
34 Correct 8 ms 14560 KB Output is correct
35 Correct 9 ms 14548 KB Output is correct
36 Correct 9 ms 14548 KB Output is correct
37 Correct 8 ms 14648 KB Output is correct
38 Correct 8 ms 14676 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14384 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14344 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14440 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14456 KB Output is correct
14 Correct 7 ms 14372 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 7 ms 14452 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 116 ms 36428 KB Output is correct
20 Correct 118 ms 36456 KB Output is correct
21 Correct 113 ms 36228 KB Output is correct
22 Correct 118 ms 35808 KB Output is correct
23 Correct 162 ms 48680 KB Output is correct
24 Correct 118 ms 39148 KB Output is correct
25 Correct 92 ms 33740 KB Output is correct
26 Correct 59 ms 38988 KB Output is correct
27 Correct 189 ms 46496 KB Output is correct
28 Correct 323 ms 76108 KB Output is correct
29 Correct 330 ms 75220 KB Output is correct
30 Correct 184 ms 46508 KB Output is correct
31 Correct 183 ms 46472 KB Output is correct
32 Correct 251 ms 46592 KB Output is correct
33 Correct 237 ms 51532 KB Output is correct
34 Correct 330 ms 83404 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 8 ms 14384 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14344 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14440 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14456 KB Output is correct
14 Correct 7 ms 14372 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 7 ms 14452 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14536 KB Output is correct
21 Correct 8 ms 14632 KB Output is correct
22 Correct 8 ms 14676 KB Output is correct
23 Correct 8 ms 14676 KB Output is correct
24 Correct 9 ms 14676 KB Output is correct
25 Correct 8 ms 14692 KB Output is correct
26 Correct 8 ms 14676 KB Output is correct
27 Correct 8 ms 14572 KB Output is correct
28 Correct 8 ms 14676 KB Output is correct
29 Correct 8 ms 14676 KB Output is correct
30 Correct 8 ms 14676 KB Output is correct
31 Correct 8 ms 14676 KB Output is correct
32 Correct 9 ms 14612 KB Output is correct
33 Correct 9 ms 14684 KB Output is correct
34 Correct 8 ms 14560 KB Output is correct
35 Correct 9 ms 14548 KB Output is correct
36 Correct 9 ms 14548 KB Output is correct
37 Correct 8 ms 14648 KB Output is correct
38 Correct 8 ms 14676 KB Output is correct
39 Correct 116 ms 36428 KB Output is correct
40 Correct 118 ms 36456 KB Output is correct
41 Correct 113 ms 36228 KB Output is correct
42 Correct 118 ms 35808 KB Output is correct
43 Correct 162 ms 48680 KB Output is correct
44 Correct 118 ms 39148 KB Output is correct
45 Correct 92 ms 33740 KB Output is correct
46 Correct 59 ms 38988 KB Output is correct
47 Correct 189 ms 46496 KB Output is correct
48 Correct 323 ms 76108 KB Output is correct
49 Correct 330 ms 75220 KB Output is correct
50 Correct 184 ms 46508 KB Output is correct
51 Correct 183 ms 46472 KB Output is correct
52 Correct 251 ms 46592 KB Output is correct
53 Correct 237 ms 51532 KB Output is correct
54 Correct 330 ms 83404 KB Output is correct
55 Correct 20 ms 17492 KB Output is correct
56 Correct 14 ms 16212 KB Output is correct
57 Correct 76 ms 33816 KB Output is correct
58 Correct 48 ms 27328 KB Output is correct
59 Correct 98 ms 45360 KB Output is correct
60 Correct 300 ms 75612 KB Output is correct
61 Correct 214 ms 49868 KB Output is correct
62 Correct 176 ms 46440 KB Output is correct
63 Correct 254 ms 46528 KB Output is correct
64 Correct 432 ms 101196 KB Output is correct
65 Correct 415 ms 99064 KB Output is correct
66 Correct 311 ms 73088 KB Output is correct
67 Correct 166 ms 40504 KB Output is correct
68 Correct 330 ms 62824 KB Output is correct
69 Correct 352 ms 67828 KB Output is correct
70 Correct 315 ms 60820 KB Output is correct