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답안 #807449

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
807449 2023-08-04T17:43:32 Z annabeth9680 경주 (Race) (IOI11_race) C++17
100 / 100
 440 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 second node, then weight of the edge
map<ll,ll> mindist[MAXN];
ll dep[MAXN],weight[MAXN];
int K; ll ans = 1e18;
void dfs(int u, int p){
    for(auto x : adj[u]){
        if(p != x.first){
            dep[x.first] = dep[u]+1;
            weight[x.first] = weight[u]+x.second;
            mindist[x.first][weight[x.first]] = dep[x.first];
            //cout << x.first << " " << dep[x.first] << " " << weight[x.first] << " " << "\n";
            dfs(x.first,u);
        }
    }
}
void smalltolarge(int u, int p){
    ll F = K+2*weight[u];
    for(auto x : adj[u]){
        if(x.first != p){
            int v = x.first;
            smalltolarge(v,u);
            if(mindist[v].size() > mindist[u].size()){
                swap(mindist[v],mindist[u]);
            }
            //cout << u << " " << v << "\n";
            for(auto m : mindist[v]){
                if(mindist[u].find(F-m.first) != mindist[u].end()){
                    ans = min(ans,mindist[u][F-m.first]+m.second-2*dep[u]);
                }
            }
            for(auto m : mindist[v]){
                if(mindist[u].find(m.first) == mindist[u].end()){
                    mindist[u][m.first] = m.second;
                }
                else{
                    mindist[u][m.first] = min(mindist[u][m.first],m.second);
                }
                //cout << m.first << " " << mindist[u][m.first] << " ";
            }
        }
    }
}
int best_path(int n, int k, int h[][2], int length[]){
    K = k;
    for(int i = 0;i<n-1;++i){
        int u = h[i][0], v = h[i][1];
        adj[u].push_back({v,length[i]});
        adj[v].push_back({u,length[i]});
    }
    mindist[0][0] = 0;
    dfs(0,-1);
    smalltolarge(0,-1);
    if(ans != 1e18) return ans;
    else return -1;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14400 KB Output is correct
2 Correct 8 ms 14400 KB Output is correct
3 Correct 7 ms 14396 KB Output is correct
4 Correct 6 ms 14400 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14400 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 6 ms 14356 KB Output is correct
10 Correct 6 ms 14420 KB Output is correct
11 Correct 6 ms 14420 KB Output is correct
12 Correct 6 ms 14420 KB Output is correct
13 Correct 6 ms 14360 KB Output is correct
14 Correct 6 ms 14400 KB Output is correct
15 Correct 6 ms 14400 KB Output is correct
16 Correct 9 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14400 KB Output is correct
2 Correct 8 ms 14400 KB Output is correct
3 Correct 7 ms 14396 KB Output is correct
4 Correct 6 ms 14400 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14400 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 6 ms 14356 KB Output is correct
10 Correct 6 ms 14420 KB Output is correct
11 Correct 6 ms 14420 KB Output is correct
12 Correct 6 ms 14420 KB Output is correct
13 Correct 6 ms 14360 KB Output is correct
14 Correct 6 ms 14400 KB Output is correct
15 Correct 6 ms 14400 KB Output is correct
16 Correct 9 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 6 ms 14420 KB Output is correct
20 Correct 6 ms 14420 KB Output is correct
21 Correct 7 ms 14660 KB Output is correct
22 Correct 7 ms 14668 KB Output is correct
23 Correct 9 ms 14736 KB Output is correct
24 Correct 7 ms 14640 KB Output is correct
25 Correct 9 ms 14672 KB Output is correct
26 Correct 8 ms 14676 KB Output is correct
27 Correct 10 ms 14560 KB Output is correct
28 Correct 8 ms 14656 KB Output is correct
29 Correct 8 ms 14756 KB Output is correct
30 Correct 7 ms 14672 KB Output is correct
31 Correct 8 ms 14760 KB Output is correct
32 Correct 9 ms 14680 KB Output is correct
33 Correct 10 ms 14664 KB Output is correct
34 Correct 7 ms 14668 KB Output is correct
35 Correct 7 ms 14660 KB Output is correct
36 Correct 7 ms 14608 KB Output is correct
37 Correct 7 ms 14676 KB Output is correct
38 Correct 7 ms 14664 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14400 KB Output is correct
2 Correct 8 ms 14400 KB Output is correct
3 Correct 7 ms 14396 KB Output is correct
4 Correct 6 ms 14400 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14400 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 6 ms 14356 KB Output is correct
10 Correct 6 ms 14420 KB Output is correct
11 Correct 6 ms 14420 KB Output is correct
12 Correct 6 ms 14420 KB Output is correct
13 Correct 6 ms 14360 KB Output is correct
14 Correct 6 ms 14400 KB Output is correct
15 Correct 6 ms 14400 KB Output is correct
16 Correct 9 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 122 ms 38936 KB Output is correct
20 Correct 150 ms 38772 KB Output is correct
21 Correct 113 ms 38428 KB Output is correct
22 Correct 110 ms 38420 KB Output is correct
23 Correct 165 ms 51416 KB Output is correct
24 Correct 125 ms 41336 KB Output is correct
25 Correct 114 ms 40028 KB Output is correct
26 Correct 68 ms 48244 KB Output is correct
27 Correct 186 ms 52580 KB Output is correct
28 Correct 291 ms 94780 KB Output is correct
29 Correct 288 ms 92928 KB Output is correct
30 Correct 189 ms 52568 KB Output is correct
31 Correct 180 ms 52560 KB Output is correct
32 Correct 268 ms 52808 KB Output is correct
33 Correct 237 ms 57536 KB Output is correct
34 Correct 320 ms 90352 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14400 KB Output is correct
2 Correct 8 ms 14400 KB Output is correct
3 Correct 7 ms 14396 KB Output is correct
4 Correct 6 ms 14400 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 9 ms 14400 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 6 ms 14356 KB Output is correct
10 Correct 6 ms 14420 KB Output is correct
11 Correct 6 ms 14420 KB Output is correct
12 Correct 6 ms 14420 KB Output is correct
13 Correct 6 ms 14360 KB Output is correct
14 Correct 6 ms 14400 KB Output is correct
15 Correct 6 ms 14400 KB Output is correct
16 Correct 9 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 6 ms 14420 KB Output is correct
20 Correct 6 ms 14420 KB Output is correct
21 Correct 7 ms 14660 KB Output is correct
22 Correct 7 ms 14668 KB Output is correct
23 Correct 9 ms 14736 KB Output is correct
24 Correct 7 ms 14640 KB Output is correct
25 Correct 9 ms 14672 KB Output is correct
26 Correct 8 ms 14676 KB Output is correct
27 Correct 10 ms 14560 KB Output is correct
28 Correct 8 ms 14656 KB Output is correct
29 Correct 8 ms 14756 KB Output is correct
30 Correct 7 ms 14672 KB Output is correct
31 Correct 8 ms 14760 KB Output is correct
32 Correct 9 ms 14680 KB Output is correct
33 Correct 10 ms 14664 KB Output is correct
34 Correct 7 ms 14668 KB Output is correct
35 Correct 7 ms 14660 KB Output is correct
36 Correct 7 ms 14608 KB Output is correct
37 Correct 7 ms 14676 KB Output is correct
38 Correct 7 ms 14664 KB Output is correct
39 Correct 122 ms 38936 KB Output is correct
40 Correct 150 ms 38772 KB Output is correct
41 Correct 113 ms 38428 KB Output is correct
42 Correct 110 ms 38420 KB Output is correct
43 Correct 165 ms 51416 KB Output is correct
44 Correct 125 ms 41336 KB Output is correct
45 Correct 114 ms 40028 KB Output is correct
46 Correct 68 ms 48244 KB Output is correct
47 Correct 186 ms 52580 KB Output is correct
48 Correct 291 ms 94780 KB Output is correct
49 Correct 288 ms 92928 KB Output is correct
50 Correct 189 ms 52568 KB Output is correct
51 Correct 180 ms 52560 KB Output is correct
52 Correct 268 ms 52808 KB Output is correct
53 Correct 237 ms 57536 KB Output is correct
54 Correct 320 ms 90352 KB Output is correct
55 Correct 19 ms 17876 KB Output is correct
56 Correct 15 ms 16464 KB Output is correct
57 Correct 63 ms 36680 KB Output is correct
58 Correct 48 ms 29164 KB Output is correct
59 Correct 78 ms 54468 KB Output is correct
60 Correct 246 ms 93380 KB Output is correct
61 Correct 216 ms 56056 KB Output is correct
62 Correct 189 ms 52632 KB Output is correct
63 Correct 250 ms 52744 KB Output is correct
64 Correct 440 ms 107588 KB Output is correct
65 Correct 403 ms 105504 KB Output is correct
66 Correct 282 ms 88992 KB Output is correct
67 Correct 160 ms 45520 KB Output is correct
68 Correct 321 ms 68984 KB Output is correct
69 Correct 354 ms 73700 KB Output is correct
70 Correct 305 ms 66636 KB Output is correct