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답안 #771072

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
771072 2023-07-02T12:19:02 Z kirakaminski968 경주 (Race) (IOI11_race) C++17
100 / 100
 408 ms 107588 KB 
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int MAXN = 2e5+5;
vector<pair<ll,ll>> adj[MAXN]; //first nodes, then weight
ll depth[MAXN],weightsum[MAXN],ans;
int n,k;
map<ll,ll> help[MAXN];
void dfs(int u, int p, ll d, int dep){
    depth[u] = dep;
    weightsum[u] = d;
    help[u][d] = dep;
    for(auto v : adj[u]){
        if(v.first != p){
            dfs(v.first,u,d+v.second,dep+1);
        }
    }
}
void smalltolarge(int u, int p){
    ll tar = k+weightsum[u]*2;
    for(auto v : adj[u]){
        if(v.first != p){
            smalltolarge(v.first,u);
            if(help[v.first].size() > help[u].size()) swap(help[v.first],help[u]);
            for(auto x : help[v.first]){
                if(help[u].find(tar-x.first) != help[u].end()){
                    ans = min(ans,x.second+help[u][tar-x.first]-2*depth[u]);
                }
            }
            for(auto x : help[v.first]){
                if(help[u].find(x.first) == help[u].end()){
                    help[u].insert(x);
                }
                else{
                    help[u][x.first] = min(help[u][x.first],x.second);
                }
            }
        }
    }
}
int best_path(int N, int K, int edges[][2], int lengths[]){
    if(K == 1) return 0;
    n = N; k = K; ans = INT_MAX;
    for(int i = 0;i<N-1;i++){
        adj[edges[i][0]].push_back({edges[i][1],lengths[i]});
        adj[edges[i][1]].push_back({edges[i][0],lengths[i]});
    }
    dfs(0,-1,0,0);
    smalltolarge(0,-1);
    if(ans != INT_MAX) return ans;
    else return -1; 
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 6 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 6 ms 14420 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14428 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14408 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 6 ms 14440 KB Output is correct
17 Correct 7 ms 14444 KB Output is correct
18 Correct 7 ms 14444 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 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 6 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 6 ms 14420 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14428 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14408 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 6 ms 14440 KB Output is correct
17 Correct 7 ms 14444 KB Output is correct
18 Correct 7 ms 14444 KB Output is correct
19 Correct 7 ms 14408 KB Output is correct
20 Correct 7 ms 14360 KB Output is correct
21 Correct 8 ms 14572 KB Output is correct
22 Correct 8 ms 14676 KB Output is correct
23 Correct 7 ms 14680 KB Output is correct
24 Correct 8 ms 14748 KB Output is correct
25 Correct 7 ms 14676 KB Output is correct
26 Correct 8 ms 14760 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 8 ms 14720 KB Output is correct
29 Correct 8 ms 14676 KB Output is correct
30 Correct 8 ms 14680 KB Output is correct
31 Correct 8 ms 14676 KB Output is correct
32 Correct 7 ms 14680 KB Output is correct
33 Correct 7 ms 14676 KB Output is correct
34 Correct 7 ms 14676 KB Output is correct
35 Correct 7 ms 14676 KB Output is correct
36 Correct 7 ms 14676 KB Output is correct
37 Correct 8 ms 14676 KB Output is correct
38 Correct 7 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 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 6 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 6 ms 14420 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14428 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14408 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 6 ms 14440 KB Output is correct
17 Correct 7 ms 14444 KB Output is correct
18 Correct 7 ms 14444 KB Output is correct
19 Correct 110 ms 39212 KB Output is correct
20 Correct 135 ms 39172 KB Output is correct
21 Correct 111 ms 38924 KB Output is correct
22 Correct 115 ms 38508 KB Output is correct
23 Correct 147 ms 51444 KB Output is correct
24 Correct 107 ms 41460 KB Output is correct
25 Correct 100 ms 39960 KB Output is correct
26 Correct 54 ms 48228 KB Output is correct
27 Correct 202 ms 52620 KB Output is correct
28 Correct 262 ms 94748 KB Output is correct
29 Correct 275 ms 92932 KB Output is correct
30 Correct 172 ms 52560 KB Output is correct
31 Correct 185 ms 52516 KB Output is correct
32 Correct 255 ms 52664 KB Output is correct
33 Correct 232 ms 57532 KB Output is correct
34 Correct 317 ms 90444 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 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 6 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 6 ms 14420 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14428 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14408 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 7 ms 14420 KB Output is correct
16 Correct 6 ms 14440 KB Output is correct
17 Correct 7 ms 14444 KB Output is correct
18 Correct 7 ms 14444 KB Output is correct
19 Correct 7 ms 14408 KB Output is correct
20 Correct 7 ms 14360 KB Output is correct
21 Correct 8 ms 14572 KB Output is correct
22 Correct 8 ms 14676 KB Output is correct
23 Correct 7 ms 14680 KB Output is correct
24 Correct 8 ms 14748 KB Output is correct
25 Correct 7 ms 14676 KB Output is correct
26 Correct 8 ms 14760 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 8 ms 14720 KB Output is correct
29 Correct 8 ms 14676 KB Output is correct
30 Correct 8 ms 14680 KB Output is correct
31 Correct 8 ms 14676 KB Output is correct
32 Correct 7 ms 14680 KB Output is correct
33 Correct 7 ms 14676 KB Output is correct
34 Correct 7 ms 14676 KB Output is correct
35 Correct 7 ms 14676 KB Output is correct
36 Correct 7 ms 14676 KB Output is correct
37 Correct 8 ms 14676 KB Output is correct
38 Correct 7 ms 14676 KB Output is correct
39 Correct 110 ms 39212 KB Output is correct
40 Correct 135 ms 39172 KB Output is correct
41 Correct 111 ms 38924 KB Output is correct
42 Correct 115 ms 38508 KB Output is correct
43 Correct 147 ms 51444 KB Output is correct
44 Correct 107 ms 41460 KB Output is correct
45 Correct 100 ms 39960 KB Output is correct
46 Correct 54 ms 48228 KB Output is correct
47 Correct 202 ms 52620 KB Output is correct
48 Correct 262 ms 94748 KB Output is correct
49 Correct 275 ms 92932 KB Output is correct
50 Correct 172 ms 52560 KB Output is correct
51 Correct 185 ms 52516 KB Output is correct
52 Correct 255 ms 52664 KB Output is correct
53 Correct 232 ms 57532 KB Output is correct
54 Correct 317 ms 90444 KB Output is correct
55 Correct 19 ms 17824 KB Output is correct
56 Correct 13 ms 16468 KB Output is correct
57 Correct 76 ms 36648 KB Output is correct
58 Correct 47 ms 29136 KB Output is correct
59 Correct 84 ms 54484 KB Output is correct
60 Correct 244 ms 93424 KB Output is correct
61 Correct 230 ms 56140 KB Output is correct
62 Correct 172 ms 52556 KB Output is correct
63 Correct 245 ms 52688 KB Output is correct
64 Correct 408 ms 107588 KB Output is correct
65 Correct 396 ms 105592 KB Output is correct
66 Correct 275 ms 88964 KB Output is correct
67 Correct 171 ms 45648 KB Output is correct
68 Correct 312 ms 69032 KB Output is correct
69 Correct 360 ms 73716 KB Output is correct
70 Correct 311 ms 66632 KB Output is correct