oj.uz

답안 #1026168

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1026168 2024-07-17T16:27:42 Z vanea 경주 (Race) (IOI11_race) C++14
100 / 100
 505 ms 49788 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
 
const int mxN = 2e5+10;
const int mxK = 1e6+10;
const int INF = 1e9+10;
int ans = INF, k;
 
vector<array<int, 2>> adj[mxN];
 
bool vis[mxN];
int sz[mxN];
 
void get_sz(int node, int p) {
    sz[node] = 1;
    for(auto [it, w] : adj[node]) {
        if(it == p || vis[it]) continue;
        get_sz(it, node);
        sz[node] += sz[it];
    }
}
 
int get_c(int node, int p, int n) {
    for(auto [it, w] : adj[node]) {
        if(vis[it] || it == p) continue;
        if(sz[it] * 2 > n) return get_c(it, node, n);
    }
    return node;
}
 
void get_min(int node, int p, bool filling, int dist, int s, unordered_map<int, int>& d) {
    if(s > k) return ;
    if(filling) {
        if(!d.count(s)) d[s] = dist;
        else d[s] = min(d[s], dist);
    }
    else {
        if(d.count(k-s)) ans = min(ans, dist+d[k-s]);
    }
    for(auto [it, w] : adj[node]) {
        if(it == p || vis[it]) continue;
        get_min(it, node, filling, dist+1, s+w, d);
    }
}
 
void build(int node) {
    get_sz(node, -1);
    int c = get_c(node, -1, sz[node]);
    vis[c] = true;
    unordered_map<int, int> m;
    m[0] = 0;
    for(auto [it, w] : adj[c]) {
        if(vis[it]) continue;
        get_min(it, c, 0, 1, w, m);
        get_min(it, c, 1, 1, w, m);
    }
    for(auto [it, w] : adj[c]) {
        if(vis[it]) continue;
        build(it);
    }
}
 
int best_path(int n, int K, int h[][2], int l[]) {
    for(int i = 0; i < n-1; i++) {
        adj[h[i][0]].push_back({h[i][1], l[i]});
        adj[h[i][1]].push_back({h[i][0], l[i]});
    }
    k = K;
    build(0);
    return (ans == INF ? -1 : ans);
}
/*
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout << best_path(4, 3, {{0, 1}, {1, 2}, {1, 3}},
                      {1, 2, 4});
}*/

Compilation message

race.cpp: In function 'void get_sz(int, int)':
race.cpp:17:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   17 |     for(auto [it, w] : adj[node]) {
      |              ^
race.cpp: In function 'int get_c(int, int, int)':
race.cpp:25:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   25 |     for(auto [it, w] : adj[node]) {
      |              ^
race.cpp: In function 'void get_min(int, int, bool, int, int, std::unordered_map<int, int>&)':
race.cpp:41:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   41 |     for(auto [it, w] : adj[node]) {
      |              ^
race.cpp: In function 'void build(int)':
race.cpp:53:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   53 |     for(auto [it, w] : adj[c]) {
      |              ^
race.cpp:58:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   58 |     for(auto [it, w] : adj[c]) {
      |              ^

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9560 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 1 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 1 ms 9564 KB Output is correct
15 Correct 2 ms 9552 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 1 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9560 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 1 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 1 ms 9564 KB Output is correct
15 Correct 2 ms 9552 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 1 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct
21 Correct 2 ms 9820 KB Output is correct
22 Correct 2 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 2 ms 9820 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9564 KB Output is correct
28 Correct 3 ms 9820 KB Output is correct
29 Correct 2 ms 9752 KB Output is correct
30 Correct 2 ms 9752 KB Output is correct
31 Correct 2 ms 9820 KB Output is correct
32 Correct 2 ms 9820 KB Output is correct
33 Correct 3 ms 9816 KB Output is correct
34 Correct 2 ms 9820 KB Output is correct
35 Correct 2 ms 9820 KB Output is correct
36 Correct 2 ms 9820 KB Output is correct
37 Correct 2 ms 9832 KB Output is correct
38 Correct 2 ms 9820 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9560 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 1 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 1 ms 9564 KB Output is correct
15 Correct 2 ms 9552 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 1 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 93 ms 15648 KB Output is correct
20 Correct 99 ms 15652 KB Output is correct
21 Correct 100 ms 15456 KB Output is correct
22 Correct 90 ms 15680 KB Output is correct
23 Correct 51 ms 15708 KB Output is correct
24 Correct 45 ms 15704 KB Output is correct
25 Correct 88 ms 19032 KB Output is correct
26 Correct 98 ms 22868 KB Output is correct
27 Correct 119 ms 19536 KB Output is correct
28 Correct 174 ms 33616 KB Output is correct
29 Correct 159 ms 32656 KB Output is correct
30 Correct 156 ms 19540 KB Output is correct
31 Correct 154 ms 19384 KB Output is correct
32 Correct 159 ms 19796 KB Output is correct
33 Correct 146 ms 18464 KB Output is correct
34 Correct 107 ms 18256 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9560 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 1 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 1 ms 9564 KB Output is correct
15 Correct 2 ms 9552 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 1 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct
21 Correct 2 ms 9820 KB Output is correct
22 Correct 2 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 2 ms 9820 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9564 KB Output is correct
28 Correct 3 ms 9820 KB Output is correct
29 Correct 2 ms 9752 KB Output is correct
30 Correct 2 ms 9752 KB Output is correct
31 Correct 2 ms 9820 KB Output is correct
32 Correct 2 ms 9820 KB Output is correct
33 Correct 3 ms 9816 KB Output is correct
34 Correct 2 ms 9820 KB Output is correct
35 Correct 2 ms 9820 KB Output is correct
36 Correct 2 ms 9820 KB Output is correct
37 Correct 2 ms 9832 KB Output is correct
38 Correct 2 ms 9820 KB Output is correct
39 Correct 93 ms 15648 KB Output is correct
40 Correct 99 ms 15652 KB Output is correct
41 Correct 100 ms 15456 KB Output is correct
42 Correct 90 ms 15680 KB Output is correct
43 Correct 51 ms 15708 KB Output is correct
44 Correct 45 ms 15704 KB Output is correct
45 Correct 88 ms 19032 KB Output is correct
46 Correct 98 ms 22868 KB Output is correct
47 Correct 119 ms 19536 KB Output is correct
48 Correct 174 ms 33616 KB Output is correct
49 Correct 159 ms 32656 KB Output is correct
50 Correct 156 ms 19540 KB Output is correct
51 Correct 154 ms 19384 KB Output is correct
52 Correct 159 ms 19796 KB Output is correct
53 Correct 146 ms 18464 KB Output is correct
54 Correct 107 ms 18256 KB Output is correct
55 Correct 10 ms 10328 KB Output is correct
56 Correct 8 ms 10016 KB Output is correct
57 Correct 80 ms 15708 KB Output is correct
58 Correct 29 ms 15824 KB Output is correct
59 Correct 146 ms 28776 KB Output is correct
60 Correct 505 ms 49788 KB Output is correct
61 Correct 163 ms 21052 KB Output is correct
62 Correct 192 ms 21752 KB Output is correct
63 Correct 187 ms 21820 KB Output is correct
64 Correct 399 ms 30144 KB Output is correct
65 Correct 117 ms 22400 KB Output is correct
66 Correct 341 ms 31452 KB Output is correct
67 Correct 70 ms 22976 KB Output is correct
68 Correct 221 ms 27748 KB Output is correct
69 Correct 248 ms 25968 KB Output is correct
70 Correct 212 ms 28004 KB Output is correct