oj.uz

답안 #525816

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525816 2022-02-13T00:09:35 Z gg123_pe 경주 (Race) (IOI11_race) C++17
100 / 100
 559 ms 63864 KB 
#include <bits/stdc++.h> 
#include "race.h" 
using namespace std; 

typedef long long ll; 
#define f(i,a,b) for(int i = a; i < b; i++)
#define ff first
#define ss second

const ll N = 1e6 + 5; 

ll n, k, sz[N], ans = N, dist[N], dreal[N], aux[N]; 
bool on[N]; 
vector <pair<int,ll>> adj[N]; 
vector <int> ra; 

int size(int u, int f){
    sz[u] = 1;
    for(auto v: adj[u]) if(v.first != f and !on[v.first]) sz[u] += size(v.first, u); 
    return sz[u]; 
}
int get_centroid(int u, int f, int curr_size){
    for(auto v: adj[u]) if(v.first != f and !on[v.first] and sz[v.first]*2 > curr_size) return get_centroid(v.first, u, curr_size);
    return u; 
}
void get_tree(int u, int f){
    ra.push_back(u); 
    for(auto v: adj[u]) if(v.first != f and !on[v.first]) get_tree(v.first, u); 
}
void dfs(int u, int f){
    for(auto p: adj[u]){
        ll v = p.first, w = p.second; 
        if(v == f or on[v]) continue; 
        dist[v] = dist[u] + 1; 
        dreal[v] = dreal[u] + w; 
        dfs(v, u); 
    }
}
void solve(int u, int f){
    int cen = get_centroid(u, f, size(u, f)); 

    on[cen] = 1, dist[cen] = dreal[cen] = 0; 
    dfs(cen, f); 

    vector <ll> AUX; 
    for(auto p: adj[cen]){
        int v = p.ff; 
        if(v == f or on[v]) continue; 
        ra.clear(); get_tree(v, cen); 
        for(int x: ra){
            if(dreal[x] == k){
                ans = min(ans, dist[x]);
            }
            else if(dreal[x] > k) continue; 
            ans = min(ans, aux[k-dreal[x]] + dist[x]); 
        }
        for(int x: ra){
            if(dreal[x] >= k) continue; 
            aux[dreal[x]] = min(aux[dreal[x]], dist[x]); 
            AUX.push_back(dreal[x]); 
        }
    }
    for(int x: AUX) aux[x] = N; 
    for(auto v: adj[cen]) if(v.first != f and !on[v.first]) solve(v.first, cen);
}
int best_path(int m, int K, int H[][2], int L[]){
    n = m, k = K; 
    f(i,0,n-1){
        ll u = H[i][0], v = H[i][1], w = L[i]; 
        adj[u].push_back({v, w}); 
        adj[v].push_back({u, w}); 
    }
    f(i,0,N) aux[i] = N; 
    solve(0, -1);
    if(ans == N) ans = -1; 
    return ans; 
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 31564 KB Output is correct
2 Correct 15 ms 31552 KB Output is correct
3 Correct 15 ms 31564 KB Output is correct
4 Correct 16 ms 31600 KB Output is correct
5 Correct 15 ms 31584 KB Output is correct
6 Correct 18 ms 31576 KB Output is correct
7 Correct 16 ms 31596 KB Output is correct
8 Correct 15 ms 31660 KB Output is correct
9 Correct 15 ms 31576 KB Output is correct
10 Correct 16 ms 31600 KB Output is correct
11 Correct 14 ms 31652 KB Output is correct
12 Correct 16 ms 31564 KB Output is correct
13 Correct 15 ms 31564 KB Output is correct
14 Correct 14 ms 31616 KB Output is correct
15 Correct 15 ms 31600 KB Output is correct
16 Correct 14 ms 31576 KB Output is correct
17 Correct 14 ms 31564 KB Output is correct
18 Correct 14 ms 31576 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 31564 KB Output is correct
2 Correct 15 ms 31552 KB Output is correct
3 Correct 15 ms 31564 KB Output is correct
4 Correct 16 ms 31600 KB Output is correct
5 Correct 15 ms 31584 KB Output is correct
6 Correct 18 ms 31576 KB Output is correct
7 Correct 16 ms 31596 KB Output is correct
8 Correct 15 ms 31660 KB Output is correct
9 Correct 15 ms 31576 KB Output is correct
10 Correct 16 ms 31600 KB Output is correct
11 Correct 14 ms 31652 KB Output is correct
12 Correct 16 ms 31564 KB Output is correct
13 Correct 15 ms 31564 KB Output is correct
14 Correct 14 ms 31616 KB Output is correct
15 Correct 15 ms 31600 KB Output is correct
16 Correct 14 ms 31576 KB Output is correct
17 Correct 14 ms 31564 KB Output is correct
18 Correct 14 ms 31576 KB Output is correct
19 Correct 14 ms 31564 KB Output is correct
20 Correct 14 ms 31564 KB Output is correct
21 Correct 15 ms 31756 KB Output is correct
22 Correct 20 ms 31712 KB Output is correct
23 Correct 15 ms 31692 KB Output is correct
24 Correct 15 ms 31692 KB Output is correct
25 Correct 16 ms 31624 KB Output is correct
26 Correct 15 ms 31660 KB Output is correct
27 Correct 14 ms 31732 KB Output is correct
28 Correct 15 ms 31668 KB Output is correct
29 Correct 17 ms 31668 KB Output is correct
30 Correct 16 ms 31692 KB Output is correct
31 Correct 20 ms 31744 KB Output is correct
32 Correct 15 ms 31620 KB Output is correct
33 Correct 16 ms 31656 KB Output is correct
34 Correct 14 ms 31692 KB Output is correct
35 Correct 19 ms 31652 KB Output is correct
36 Correct 15 ms 31724 KB Output is correct
37 Correct 15 ms 31652 KB Output is correct
38 Correct 21 ms 31672 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 31564 KB Output is correct
2 Correct 15 ms 31552 KB Output is correct
3 Correct 15 ms 31564 KB Output is correct
4 Correct 16 ms 31600 KB Output is correct
5 Correct 15 ms 31584 KB Output is correct
6 Correct 18 ms 31576 KB Output is correct
7 Correct 16 ms 31596 KB Output is correct
8 Correct 15 ms 31660 KB Output is correct
9 Correct 15 ms 31576 KB Output is correct
10 Correct 16 ms 31600 KB Output is correct
11 Correct 14 ms 31652 KB Output is correct
12 Correct 16 ms 31564 KB Output is correct
13 Correct 15 ms 31564 KB Output is correct
14 Correct 14 ms 31616 KB Output is correct
15 Correct 15 ms 31600 KB Output is correct
16 Correct 14 ms 31576 KB Output is correct
17 Correct 14 ms 31564 KB Output is correct
18 Correct 14 ms 31576 KB Output is correct
19 Correct 212 ms 40944 KB Output is correct
20 Correct 171 ms 40800 KB Output is correct
21 Correct 236 ms 41264 KB Output is correct
22 Correct 162 ms 41916 KB Output is correct
23 Correct 121 ms 40976 KB Output is correct
24 Correct 75 ms 40052 KB Output is correct
25 Correct 185 ms 43476 KB Output is correct
26 Correct 112 ms 48096 KB Output is correct
27 Correct 214 ms 49588 KB Output is correct
28 Correct 476 ms 61340 KB Output is correct
29 Correct 524 ms 60368 KB Output is correct
30 Correct 199 ms 49644 KB Output is correct
31 Correct 220 ms 49688 KB Output is correct
32 Correct 287 ms 49564 KB Output is correct
33 Correct 393 ms 48816 KB Output is correct
34 Correct 340 ms 48864 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 31564 KB Output is correct
2 Correct 15 ms 31552 KB Output is correct
3 Correct 15 ms 31564 KB Output is correct
4 Correct 16 ms 31600 KB Output is correct
5 Correct 15 ms 31584 KB Output is correct
6 Correct 18 ms 31576 KB Output is correct
7 Correct 16 ms 31596 KB Output is correct
8 Correct 15 ms 31660 KB Output is correct
9 Correct 15 ms 31576 KB Output is correct
10 Correct 16 ms 31600 KB Output is correct
11 Correct 14 ms 31652 KB Output is correct
12 Correct 16 ms 31564 KB Output is correct
13 Correct 15 ms 31564 KB Output is correct
14 Correct 14 ms 31616 KB Output is correct
15 Correct 15 ms 31600 KB Output is correct
16 Correct 14 ms 31576 KB Output is correct
17 Correct 14 ms 31564 KB Output is correct
18 Correct 14 ms 31576 KB Output is correct
19 Correct 14 ms 31564 KB Output is correct
20 Correct 14 ms 31564 KB Output is correct
21 Correct 15 ms 31756 KB Output is correct
22 Correct 20 ms 31712 KB Output is correct
23 Correct 15 ms 31692 KB Output is correct
24 Correct 15 ms 31692 KB Output is correct
25 Correct 16 ms 31624 KB Output is correct
26 Correct 15 ms 31660 KB Output is correct
27 Correct 14 ms 31732 KB Output is correct
28 Correct 15 ms 31668 KB Output is correct
29 Correct 17 ms 31668 KB Output is correct
30 Correct 16 ms 31692 KB Output is correct
31 Correct 20 ms 31744 KB Output is correct
32 Correct 15 ms 31620 KB Output is correct
33 Correct 16 ms 31656 KB Output is correct
34 Correct 14 ms 31692 KB Output is correct
35 Correct 19 ms 31652 KB Output is correct
36 Correct 15 ms 31724 KB Output is correct
37 Correct 15 ms 31652 KB Output is correct
38 Correct 21 ms 31672 KB Output is correct
39 Correct 212 ms 40944 KB Output is correct
40 Correct 171 ms 40800 KB Output is correct
41 Correct 236 ms 41264 KB Output is correct
42 Correct 162 ms 41916 KB Output is correct
43 Correct 121 ms 40976 KB Output is correct
44 Correct 75 ms 40052 KB Output is correct
45 Correct 185 ms 43476 KB Output is correct
46 Correct 112 ms 48096 KB Output is correct
47 Correct 214 ms 49588 KB Output is correct
48 Correct 476 ms 61340 KB Output is correct
49 Correct 524 ms 60368 KB Output is correct
50 Correct 199 ms 49644 KB Output is correct
51 Correct 220 ms 49688 KB Output is correct
52 Correct 287 ms 49564 KB Output is correct
53 Correct 393 ms 48816 KB Output is correct
54 Correct 340 ms 48864 KB Output is correct
55 Correct 25 ms 32648 KB Output is correct
56 Correct 25 ms 32716 KB Output is correct
57 Correct 102 ms 42356 KB Output is correct
58 Correct 49 ms 41696 KB Output is correct
59 Correct 113 ms 48080 KB Output is correct
60 Correct 546 ms 63864 KB Output is correct
61 Correct 208 ms 49984 KB Output is correct
62 Correct 205 ms 51452 KB Output is correct
63 Correct 321 ms 51528 KB Output is correct
64 Correct 559 ms 52916 KB Output is correct
65 Correct 467 ms 49604 KB Output is correct
66 Correct 540 ms 58296 KB Output is correct
67 Correct 173 ms 51780 KB Output is correct
68 Correct 284 ms 51588 KB Output is correct
69 Correct 281 ms 51416 KB Output is correct
70 Correct 310 ms 50872 KB Output is correct