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답안 #481565

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
481565 2021-10-21T07:46:20 Z CyberSleeper 경주 (Race) (IOI11_race) C++14
100 / 100
 482 ms 107520 KB 
#include <bits/stdc++.h>
//#include "race.h"

#define ll      long long
#define pii     pair<ll, ll>
#define fi      first
#define se      second
#define pb      push_back

using namespace std;

const ll MX=200007, INF=1e9+7;

ll N, K, ret=INF;
map<ll, ll> ada[MX];
vector<pii> adj[MX];
pii lazy[MX];

void DFS(int par, int idx){
    lazy[idx]={0, 0};
    ada[idx][0]=0;
    for(auto i:adj[idx]){
        int v=i.fi, w=i.se;
        if(v==par)
            continue;
        DFS(idx, v);
        lazy[v].fi+=w;
        lazy[v].se++;
        if(ada[idx].size()<ada[v].size()){
            swap(ada[idx], ada[v]);
            swap(lazy[idx], lazy[v]);
        }
        for(auto jj:ada[v]){
            pii j=jj;
            j.fi+=lazy[v].fi-lazy[idx].fi;
            j.se+=lazy[v].se-lazy[idx].se;
            if(ada[idx].count(K-j.fi-lazy[idx].fi*2))
                ret=min(ret, lazy[idx].se*2+j.se+ada[idx][K-j.fi-lazy[idx].fi*2]);
        }
        for(auto jj:ada[v]){
            pii j=jj;
            j.fi+=lazy[v].fi-lazy[idx].fi;
            j.se+=lazy[v].se-lazy[idx].se;
            if(ada[idx].count(j.fi))
                ada[idx][j.fi]=min(ada[idx][j.fi], j.se);
            else
                ada[idx][j.fi]=j.se;
        }
    }
    if(ada[idx].count(K-lazy[idx].fi))
        ret=min(ret, lazy[idx].se+ada[idx][K-lazy[idx].fi]);
}

int best_path(int n, int k, int H[][2], int L[]){
    N=n, K=k;
    for(int i=0, u, v, w; i<N-1; i++){
        u=H[i][0], v=H[i][1], w=L[i];
        adj[u].pb({v, w});
        adj[v].pb({u, w});
    }
    DFS(0, 0);
    return (ret>=INF?-1:ret);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14440 KB Output is correct
2 Correct 12 ms 14396 KB Output is correct
3 Correct 10 ms 14440 KB Output is correct
4 Correct 12 ms 14352 KB Output is correct
5 Correct 10 ms 14388 KB Output is correct
6 Correct 10 ms 14412 KB Output is correct
7 Correct 10 ms 14412 KB Output is correct
8 Correct 10 ms 14332 KB Output is correct
9 Correct 10 ms 14424 KB Output is correct
10 Correct 9 ms 14392 KB Output is correct
11 Correct 9 ms 14412 KB Output is correct
12 Correct 9 ms 14332 KB Output is correct
13 Correct 9 ms 14412 KB Output is correct
14 Correct 9 ms 14392 KB Output is correct
15 Correct 10 ms 14352 KB Output is correct
16 Correct 11 ms 14416 KB Output is correct
17 Correct 10 ms 14412 KB Output is correct
18 Correct 12 ms 14364 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14440 KB Output is correct
2 Correct 12 ms 14396 KB Output is correct
3 Correct 10 ms 14440 KB Output is correct
4 Correct 12 ms 14352 KB Output is correct
5 Correct 10 ms 14388 KB Output is correct
6 Correct 10 ms 14412 KB Output is correct
7 Correct 10 ms 14412 KB Output is correct
8 Correct 10 ms 14332 KB Output is correct
9 Correct 10 ms 14424 KB Output is correct
10 Correct 9 ms 14392 KB Output is correct
11 Correct 9 ms 14412 KB Output is correct
12 Correct 9 ms 14332 KB Output is correct
13 Correct 9 ms 14412 KB Output is correct
14 Correct 9 ms 14392 KB Output is correct
15 Correct 10 ms 14352 KB Output is correct
16 Correct 11 ms 14416 KB Output is correct
17 Correct 10 ms 14412 KB Output is correct
18 Correct 12 ms 14364 KB Output is correct
19 Correct 10 ms 14412 KB Output is correct
20 Correct 10 ms 14396 KB Output is correct
21 Correct 13 ms 14592 KB Output is correct
22 Correct 11 ms 14660 KB Output is correct
23 Correct 11 ms 14756 KB Output is correct
24 Correct 11 ms 14668 KB Output is correct
25 Correct 14 ms 14668 KB Output is correct
26 Correct 11 ms 14668 KB Output is correct
27 Correct 10 ms 14540 KB Output is correct
28 Correct 11 ms 14668 KB Output is correct
29 Correct 11 ms 14728 KB Output is correct
30 Correct 13 ms 14660 KB Output is correct
31 Correct 14 ms 14660 KB Output is correct
32 Correct 12 ms 14668 KB Output is correct
33 Correct 10 ms 14692 KB Output is correct
34 Correct 10 ms 14616 KB Output is correct
35 Correct 11 ms 14620 KB Output is correct
36 Correct 10 ms 14564 KB Output is correct
37 Correct 10 ms 14636 KB Output is correct
38 Correct 10 ms 14656 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14440 KB Output is correct
2 Correct 12 ms 14396 KB Output is correct
3 Correct 10 ms 14440 KB Output is correct
4 Correct 12 ms 14352 KB Output is correct
5 Correct 10 ms 14388 KB Output is correct
6 Correct 10 ms 14412 KB Output is correct
7 Correct 10 ms 14412 KB Output is correct
8 Correct 10 ms 14332 KB Output is correct
9 Correct 10 ms 14424 KB Output is correct
10 Correct 9 ms 14392 KB Output is correct
11 Correct 9 ms 14412 KB Output is correct
12 Correct 9 ms 14332 KB Output is correct
13 Correct 9 ms 14412 KB Output is correct
14 Correct 9 ms 14392 KB Output is correct
15 Correct 10 ms 14352 KB Output is correct
16 Correct 11 ms 14416 KB Output is correct
17 Correct 10 ms 14412 KB Output is correct
18 Correct 12 ms 14364 KB Output is correct
19 Correct 154 ms 39200 KB Output is correct
20 Correct 145 ms 39108 KB Output is correct
21 Correct 129 ms 38828 KB Output is correct
22 Correct 142 ms 38488 KB Output is correct
23 Correct 171 ms 51396 KB Output is correct
24 Correct 136 ms 41340 KB Output is correct
25 Correct 127 ms 40004 KB Output is correct
26 Correct 64 ms 48220 KB Output is correct
27 Correct 213 ms 52604 KB Output is correct
28 Correct 320 ms 94844 KB Output is correct
29 Correct 326 ms 92992 KB Output is correct
30 Correct 212 ms 52592 KB Output is correct
31 Correct 191 ms 52548 KB Output is correct
32 Correct 261 ms 52660 KB Output is correct
33 Correct 254 ms 57536 KB Output is correct
34 Correct 363 ms 90404 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14440 KB Output is correct
2 Correct 12 ms 14396 KB Output is correct
3 Correct 10 ms 14440 KB Output is correct
4 Correct 12 ms 14352 KB Output is correct
5 Correct 10 ms 14388 KB Output is correct
6 Correct 10 ms 14412 KB Output is correct
7 Correct 10 ms 14412 KB Output is correct
8 Correct 10 ms 14332 KB Output is correct
9 Correct 10 ms 14424 KB Output is correct
10 Correct 9 ms 14392 KB Output is correct
11 Correct 9 ms 14412 KB Output is correct
12 Correct 9 ms 14332 KB Output is correct
13 Correct 9 ms 14412 KB Output is correct
14 Correct 9 ms 14392 KB Output is correct
15 Correct 10 ms 14352 KB Output is correct
16 Correct 11 ms 14416 KB Output is correct
17 Correct 10 ms 14412 KB Output is correct
18 Correct 12 ms 14364 KB Output is correct
19 Correct 10 ms 14412 KB Output is correct
20 Correct 10 ms 14396 KB Output is correct
21 Correct 13 ms 14592 KB Output is correct
22 Correct 11 ms 14660 KB Output is correct
23 Correct 11 ms 14756 KB Output is correct
24 Correct 11 ms 14668 KB Output is correct
25 Correct 14 ms 14668 KB Output is correct
26 Correct 11 ms 14668 KB Output is correct
27 Correct 10 ms 14540 KB Output is correct
28 Correct 11 ms 14668 KB Output is correct
29 Correct 11 ms 14728 KB Output is correct
30 Correct 13 ms 14660 KB Output is correct
31 Correct 14 ms 14660 KB Output is correct
32 Correct 12 ms 14668 KB Output is correct
33 Correct 10 ms 14692 KB Output is correct
34 Correct 10 ms 14616 KB Output is correct
35 Correct 11 ms 14620 KB Output is correct
36 Correct 10 ms 14564 KB Output is correct
37 Correct 10 ms 14636 KB Output is correct
38 Correct 10 ms 14656 KB Output is correct
39 Correct 154 ms 39200 KB Output is correct
40 Correct 145 ms 39108 KB Output is correct
41 Correct 129 ms 38828 KB Output is correct
42 Correct 142 ms 38488 KB Output is correct
43 Correct 171 ms 51396 KB Output is correct
44 Correct 136 ms 41340 KB Output is correct
45 Correct 127 ms 40004 KB Output is correct
46 Correct 64 ms 48220 KB Output is correct
47 Correct 213 ms 52604 KB Output is correct
48 Correct 320 ms 94844 KB Output is correct
49 Correct 326 ms 92992 KB Output is correct
50 Correct 212 ms 52592 KB Output is correct
51 Correct 191 ms 52548 KB Output is correct
52 Correct 261 ms 52660 KB Output is correct
53 Correct 254 ms 57536 KB Output is correct
54 Correct 363 ms 90404 KB Output is correct
55 Correct 25 ms 17868 KB Output is correct
56 Correct 25 ms 16448 KB Output is correct
57 Correct 88 ms 36676 KB Output is correct
58 Correct 54 ms 29136 KB Output is correct
59 Correct 95 ms 54460 KB Output is correct
60 Correct 299 ms 93456 KB Output is correct
61 Correct 243 ms 56112 KB Output is correct
62 Correct 185 ms 52656 KB Output is correct
63 Correct 260 ms 52676 KB Output is correct
64 Correct 478 ms 107520 KB Output is correct
65 Correct 482 ms 105604 KB Output is correct
66 Correct 347 ms 88868 KB Output is correct
67 Correct 177 ms 45432 KB Output is correct
68 Correct 371 ms 69020 KB Output is correct
69 Correct 365 ms 73800 KB Output is correct
70 Correct 369 ms 66600 KB Output is correct