oj.uz

답안 #890338

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
890338 2023-12-21T03:44:57 Z anarch_y 경주 (Race) (IOI11_race) C++17
100 / 100
 868 ms 53328 KB 
#include <bits/stdc++.h>
#include "race.h"
using namespace std;
using ll = long long;
#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()
#define pb push_back
 
const int maxn = 200001;
 
int N, K;
vector<int> adj[maxn];
vector<pair<int, int>> adj2[maxn];
int sub[maxn];
bool done[maxn];
 
int subtree_size(int s, int p){
    sub[s] = 1;
    for(auto u: adj[s]){
        if(u == p or done[u]) continue;
        sub[s] += subtree_size(u, s);
    }
    return sub[s];
}
 
int get_centroid(int s, int p, int num){
    for(auto u: adj[s]){
        if(u == p or done[u]) continue;
        if(2*sub[u] > num) return get_centroid(u, s, num);
    }
    return s;
}

ll ans = 1e18;
map<ll, ll> best;

void calc(int s, int p, bool fill, int d, int wt){
    if(wt > K) return;
    if(fill){
        if(best.count(wt)) best[wt] = min(best[wt], 1LL*d);
        else best[wt] = d;
    } 
    else{
        if(best.count(K-wt)){
            ans = min(ans, best[K-wt] + 1LL*d);
        }
    }
    for(auto &[u, t]: adj2[s]){
        if(u == p or done[u]) continue;
        calc(u, s, fill, d+1, wt+t);
    } 
}
 
void centroid_decomp(int s){
    int num = subtree_size(s, 0);
    int cent = get_centroid(s, 0, num);

    best[0] = 0;
    for(auto &[u, w]: adj2[cent]){
        if(done[u]) continue;
        calc(u, cent, false, 1, w);
        calc(u, cent, true, 1, w);
    }
    best.clear();

    done[cent] = true;
    for(auto u: adj[cent]){
        if(!done[u]) centroid_decomp(u);
    }
}
 
int best_path(int _N, int _K, int H[][2], int L[]){
    N = _N, K = _K;
    for(int i=0; i<N-1; i++){
        int a = H[i][0], b = H[i][1], w = L[i];
        a++; b++;
        adj[a].pb(b); adj[b].pb(a);
        adj2[a].pb({b, w}); adj2[b].pb({a, w});
    }
    centroid_decomp(1);
    if(ans == 1e18) ans = -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 14424 KB Output is correct
2 Correct 3 ms 14428 KB Output is correct
3 Correct 3 ms 14428 KB Output is correct
4 Correct 3 ms 14680 KB Output is correct
5 Correct 3 ms 14428 KB Output is correct
6 Correct 3 ms 14428 KB Output is correct
7 Correct 3 ms 14428 KB Output is correct
8 Correct 3 ms 14428 KB Output is correct
9 Correct 4 ms 14256 KB Output is correct
10 Correct 3 ms 14424 KB Output is correct
11 Correct 3 ms 14428 KB Output is correct
12 Correct 3 ms 14428 KB Output is correct
13 Correct 3 ms 14428 KB Output is correct
14 Correct 3 ms 14428 KB Output is correct
15 Correct 3 ms 14428 KB Output is correct
16 Correct 3 ms 14428 KB Output is correct
17 Correct 3 ms 14428 KB Output is correct
18 Correct 3 ms 14428 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 14424 KB Output is correct
2 Correct 3 ms 14428 KB Output is correct
3 Correct 3 ms 14428 KB Output is correct
4 Correct 3 ms 14680 KB Output is correct
5 Correct 3 ms 14428 KB Output is correct
6 Correct 3 ms 14428 KB Output is correct
7 Correct 3 ms 14428 KB Output is correct
8 Correct 3 ms 14428 KB Output is correct
9 Correct 4 ms 14256 KB Output is correct
10 Correct 3 ms 14424 KB Output is correct
11 Correct 3 ms 14428 KB Output is correct
12 Correct 3 ms 14428 KB Output is correct
13 Correct 3 ms 14428 KB Output is correct
14 Correct 3 ms 14428 KB Output is correct
15 Correct 3 ms 14428 KB Output is correct
16 Correct 3 ms 14428 KB Output is correct
17 Correct 3 ms 14428 KB Output is correct
18 Correct 3 ms 14428 KB Output is correct
19 Correct 3 ms 14428 KB Output is correct
20 Correct 3 ms 14428 KB Output is correct
21 Correct 4 ms 14424 KB Output is correct
22 Correct 3 ms 14428 KB Output is correct
23 Correct 3 ms 14428 KB Output is correct
24 Correct 3 ms 14428 KB Output is correct
25 Correct 5 ms 14428 KB Output is correct
26 Correct 4 ms 14428 KB Output is correct
27 Correct 3 ms 14428 KB Output is correct
28 Correct 5 ms 14428 KB Output is correct
29 Correct 4 ms 14428 KB Output is correct
30 Correct 4 ms 14428 KB Output is correct
31 Correct 4 ms 14432 KB Output is correct
32 Correct 4 ms 14428 KB Output is correct
33 Correct 4 ms 14428 KB Output is correct
34 Correct 4 ms 14428 KB Output is correct
35 Correct 4 ms 14436 KB Output is correct
36 Correct 4 ms 14428 KB Output is correct
37 Correct 4 ms 14580 KB Output is correct
38 Correct 5 ms 14448 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 14424 KB Output is correct
2 Correct 3 ms 14428 KB Output is correct
3 Correct 3 ms 14428 KB Output is correct
4 Correct 3 ms 14680 KB Output is correct
5 Correct 3 ms 14428 KB Output is correct
6 Correct 3 ms 14428 KB Output is correct
7 Correct 3 ms 14428 KB Output is correct
8 Correct 3 ms 14428 KB Output is correct
9 Correct 4 ms 14256 KB Output is correct
10 Correct 3 ms 14424 KB Output is correct
11 Correct 3 ms 14428 KB Output is correct
12 Correct 3 ms 14428 KB Output is correct
13 Correct 3 ms 14428 KB Output is correct
14 Correct 3 ms 14428 KB Output is correct
15 Correct 3 ms 14428 KB Output is correct
16 Correct 3 ms 14428 KB Output is correct
17 Correct 3 ms 14428 KB Output is correct
18 Correct 3 ms 14428 KB Output is correct
19 Correct 156 ms 23500 KB Output is correct
20 Correct 172 ms 23572 KB Output is correct
21 Correct 173 ms 23536 KB Output is correct
22 Correct 162 ms 23636 KB Output is correct
23 Correct 71 ms 23632 KB Output is correct
24 Correct 85 ms 23820 KB Output is correct
25 Correct 121 ms 26140 KB Output is correct
26 Correct 100 ms 28952 KB Output is correct
27 Correct 201 ms 31060 KB Output is correct
28 Correct 228 ms 41608 KB Output is correct
29 Correct 231 ms 40532 KB Output is correct
30 Correct 210 ms 31084 KB Output is correct
31 Correct 238 ms 31060 KB Output is correct
32 Correct 239 ms 31316 KB Output is correct
33 Correct 239 ms 29308 KB Output is correct
34 Correct 163 ms 29264 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 14424 KB Output is correct
2 Correct 3 ms 14428 KB Output is correct
3 Correct 3 ms 14428 KB Output is correct
4 Correct 3 ms 14680 KB Output is correct
5 Correct 3 ms 14428 KB Output is correct
6 Correct 3 ms 14428 KB Output is correct
7 Correct 3 ms 14428 KB Output is correct
8 Correct 3 ms 14428 KB Output is correct
9 Correct 4 ms 14256 KB Output is correct
10 Correct 3 ms 14424 KB Output is correct
11 Correct 3 ms 14428 KB Output is correct
12 Correct 3 ms 14428 KB Output is correct
13 Correct 3 ms 14428 KB Output is correct
14 Correct 3 ms 14428 KB Output is correct
15 Correct 3 ms 14428 KB Output is correct
16 Correct 3 ms 14428 KB Output is correct
17 Correct 3 ms 14428 KB Output is correct
18 Correct 3 ms 14428 KB Output is correct
19 Correct 3 ms 14428 KB Output is correct
20 Correct 3 ms 14428 KB Output is correct
21 Correct 4 ms 14424 KB Output is correct
22 Correct 3 ms 14428 KB Output is correct
23 Correct 3 ms 14428 KB Output is correct
24 Correct 3 ms 14428 KB Output is correct
25 Correct 5 ms 14428 KB Output is correct
26 Correct 4 ms 14428 KB Output is correct
27 Correct 3 ms 14428 KB Output is correct
28 Correct 5 ms 14428 KB Output is correct
29 Correct 4 ms 14428 KB Output is correct
30 Correct 4 ms 14428 KB Output is correct
31 Correct 4 ms 14432 KB Output is correct
32 Correct 4 ms 14428 KB Output is correct
33 Correct 4 ms 14428 KB Output is correct
34 Correct 4 ms 14428 KB Output is correct
35 Correct 4 ms 14436 KB Output is correct
36 Correct 4 ms 14428 KB Output is correct
37 Correct 4 ms 14580 KB Output is correct
38 Correct 5 ms 14448 KB Output is correct
39 Correct 156 ms 23500 KB Output is correct
40 Correct 172 ms 23572 KB Output is correct
41 Correct 173 ms 23536 KB Output is correct
42 Correct 162 ms 23636 KB Output is correct
43 Correct 71 ms 23632 KB Output is correct
44 Correct 85 ms 23820 KB Output is correct
45 Correct 121 ms 26140 KB Output is correct
46 Correct 100 ms 28952 KB Output is correct
47 Correct 201 ms 31060 KB Output is correct
48 Correct 228 ms 41608 KB Output is correct
49 Correct 231 ms 40532 KB Output is correct
50 Correct 210 ms 31084 KB Output is correct
51 Correct 238 ms 31060 KB Output is correct
52 Correct 239 ms 31316 KB Output is correct
53 Correct 239 ms 29308 KB Output is correct
54 Correct 163 ms 29264 KB Output is correct
55 Correct 21 ms 15200 KB Output is correct
56 Correct 14 ms 14940 KB Output is correct
57 Correct 142 ms 23664 KB Output is correct
58 Correct 43 ms 24064 KB Output is correct
59 Correct 249 ms 33864 KB Output is correct
60 Correct 788 ms 53328 KB Output is correct
61 Correct 253 ms 31320 KB Output is correct
62 Correct 263 ms 31300 KB Output is correct
63 Correct 340 ms 31316 KB Output is correct
64 Correct 868 ms 36552 KB Output is correct
65 Correct 239 ms 30604 KB Output is correct
66 Correct 471 ms 39116 KB Output is correct
67 Correct 124 ms 31540 KB Output is correct
68 Correct 389 ms 36124 KB Output is correct
69 Correct 393 ms 35860 KB Output is correct
70 Correct 356 ms 35396 KB Output is correct