oj.uz

답안 #1097231

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1097231 2024-10-06T14:00:50 Z orcslop 경주 (Race) (IOI11_race) C++17
100 / 100
 384 ms 85328 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long; 
#define pb push_back
#define all(x) begin(x), end(x)
#define sz(x) (int) (x).size()
#define f first
#define s second
#define pii pair<int, int>
bool ckmin(int& a, int b){ return b < a ? a = b, true : false; }
bool ckmax(int& a, int b){ return b > a ? a = b, true : false; }

struct Highway{
    int a, b, w; 
}; 

const int N = 2e5 + 5; 

int n, K, ans = 1e9; 
ll c[N]; 
int d[N]; 
Highway h[N]; 
map<int, int> mp[N]; 
vector<pii> adj[N]; 

void dfs(int node, int prev, ll sum = 0, int dist = 0){
    c[node] = sum; 
    d[node] = dist; 
    mp[node][sum] = dist; 
    for(auto x : adj[node]){
        if(x.f == prev) continue; 
        dfs(x.f, node, sum + x.s, dist + 1); 
    }
}

void dfs2(int node, int prev){
    ll t = K + 2 * c[node]; 
    for(auto x : adj[node]){
        if(x.f == prev) continue; 
        dfs2(x.f, node); 
        if(sz(mp[x.f]) > sz(mp[node])) {
            swap(mp[x.f], mp[node]); 
        }
        for(auto y : mp[x.f]){
            if(mp[node].count(t - y.f)){
                ckmin(ans, mp[node][t - y.f] + y.s - 2 * d[node]); 
            }
        }
        for(auto y : mp[x.f]){
            if(!mp[node].count(y.f)){
                mp[node][y.f] = y.s; 
            }
            else{
                ckmin(mp[node][y.f], y.s); 
            }
        }
    }
}

int best_path(int n, int k, int edges[][2], int weights[]) {
    if (k == 1) { return 0; }
    K = k; 
    for (int i = 0; i < n - 1; i++) {
        int u = edges[i][0];
        int v = edges[i][1];
        adj[u].pb({v, weights[i]});
        adj[v].pb({u, weights[i]});
    }
    dfs(0, -1); 
    dfs2(0, -1); 
    return (ans == 1e9 ? -1 : ans);
}

// int32_t main() {
//     cin.tie(0)->sync_with_stdio(0);
//     cin >> n >> k; 
//     for(int i = 0; i < n - 1; i++){
//         cin >> h[i].a >> h[i].b; 
//     }
//     for(int i = 0; i < n - 1; i++){
//         cin >> h[i].w; 
//     }
//     for(int i = 0; i < n - 1; i++){
//         adj[h[i].a].pb({h[i].b, h[i].w}); 
//         adj[h[i].b].pb({h[i].a, h[i].w}); 
//     }
//     dfs(0, -1); 
//     dfs2(0, -1); 
//     cout << (ans < 1e9 ? ans : -1) << '\n'; 
//     return 0; 
// }

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14428 KB Output is correct
2 Correct 7 ms 14428 KB Output is correct
3 Correct 6 ms 14428 KB Output is correct
4 Correct 6 ms 14428 KB Output is correct
5 Correct 6 ms 14484 KB Output is correct
6 Correct 6 ms 14428 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 6 ms 14424 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 7 ms 14452 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 8 ms 14428 KB Output is correct
13 Correct 6 ms 14404 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14592 KB Output is correct
16 Correct 6 ms 14540 KB Output is correct
17 Correct 8 ms 14428 KB Output is correct
18 Correct 7 ms 14428 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14428 KB Output is correct
2 Correct 7 ms 14428 KB Output is correct
3 Correct 6 ms 14428 KB Output is correct
4 Correct 6 ms 14428 KB Output is correct
5 Correct 6 ms 14484 KB Output is correct
6 Correct 6 ms 14428 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 6 ms 14424 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 7 ms 14452 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 8 ms 14428 KB Output is correct
13 Correct 6 ms 14404 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14592 KB Output is correct
16 Correct 6 ms 14540 KB Output is correct
17 Correct 8 ms 14428 KB Output is correct
18 Correct 7 ms 14428 KB Output is correct
19 Correct 6 ms 14424 KB Output is correct
20 Correct 9 ms 14424 KB Output is correct
21 Correct 7 ms 14680 KB Output is correct
22 Correct 7 ms 14684 KB Output is correct
23 Correct 8 ms 14684 KB Output is correct
24 Correct 8 ms 14684 KB Output is correct
25 Correct 8 ms 14684 KB Output is correct
26 Correct 10 ms 14712 KB Output is correct
27 Correct 8 ms 14684 KB Output is correct
28 Correct 8 ms 14684 KB Output is correct
29 Correct 8 ms 14684 KB Output is correct
30 Correct 7 ms 14612 KB Output is correct
31 Correct 8 ms 14684 KB Output is correct
32 Correct 8 ms 14684 KB Output is correct
33 Correct 7 ms 14680 KB Output is correct
34 Correct 7 ms 14584 KB Output is correct
35 Correct 7 ms 14684 KB Output is correct
36 Correct 7 ms 14684 KB Output is correct
37 Correct 6 ms 14684 KB Output is correct
38 Correct 7 ms 14728 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14428 KB Output is correct
2 Correct 7 ms 14428 KB Output is correct
3 Correct 6 ms 14428 KB Output is correct
4 Correct 6 ms 14428 KB Output is correct
5 Correct 6 ms 14484 KB Output is correct
6 Correct 6 ms 14428 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 6 ms 14424 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 7 ms 14452 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 8 ms 14428 KB Output is correct
13 Correct 6 ms 14404 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14592 KB Output is correct
16 Correct 6 ms 14540 KB Output is correct
17 Correct 8 ms 14428 KB Output is correct
18 Correct 7 ms 14428 KB Output is correct
19 Correct 91 ms 33612 KB Output is correct
20 Correct 102 ms 33616 KB Output is correct
21 Correct 84 ms 33220 KB Output is correct
22 Correct 85 ms 33048 KB Output is correct
23 Correct 126 ms 42576 KB Output is correct
24 Correct 94 ms 35668 KB Output is correct
25 Correct 75 ms 34640 KB Output is correct
26 Correct 52 ms 41596 KB Output is correct
27 Correct 135 ms 43856 KB Output is correct
28 Correct 250 ms 78416 KB Output is correct
29 Correct 222 ms 76736 KB Output is correct
30 Correct 130 ms 43864 KB Output is correct
31 Correct 129 ms 43860 KB Output is correct
32 Correct 211 ms 43940 KB Output is correct
33 Correct 187 ms 47360 KB Output is correct
34 Correct 269 ms 72276 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14428 KB Output is correct
2 Correct 7 ms 14428 KB Output is correct
3 Correct 6 ms 14428 KB Output is correct
4 Correct 6 ms 14428 KB Output is correct
5 Correct 6 ms 14484 KB Output is correct
6 Correct 6 ms 14428 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 6 ms 14424 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 7 ms 14452 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 8 ms 14428 KB Output is correct
13 Correct 6 ms 14404 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14592 KB Output is correct
16 Correct 6 ms 14540 KB Output is correct
17 Correct 8 ms 14428 KB Output is correct
18 Correct 7 ms 14428 KB Output is correct
19 Correct 6 ms 14424 KB Output is correct
20 Correct 9 ms 14424 KB Output is correct
21 Correct 7 ms 14680 KB Output is correct
22 Correct 7 ms 14684 KB Output is correct
23 Correct 8 ms 14684 KB Output is correct
24 Correct 8 ms 14684 KB Output is correct
25 Correct 8 ms 14684 KB Output is correct
26 Correct 10 ms 14712 KB Output is correct
27 Correct 8 ms 14684 KB Output is correct
28 Correct 8 ms 14684 KB Output is correct
29 Correct 8 ms 14684 KB Output is correct
30 Correct 7 ms 14612 KB Output is correct
31 Correct 8 ms 14684 KB Output is correct
32 Correct 8 ms 14684 KB Output is correct
33 Correct 7 ms 14680 KB Output is correct
34 Correct 7 ms 14584 KB Output is correct
35 Correct 7 ms 14684 KB Output is correct
36 Correct 7 ms 14684 KB Output is correct
37 Correct 6 ms 14684 KB Output is correct
38 Correct 7 ms 14728 KB Output is correct
39 Correct 91 ms 33612 KB Output is correct
40 Correct 102 ms 33616 KB Output is correct
41 Correct 84 ms 33220 KB Output is correct
42 Correct 85 ms 33048 KB Output is correct
43 Correct 126 ms 42576 KB Output is correct
44 Correct 94 ms 35668 KB Output is correct
45 Correct 75 ms 34640 KB Output is correct
46 Correct 52 ms 41596 KB Output is correct
47 Correct 135 ms 43856 KB Output is correct
48 Correct 250 ms 78416 KB Output is correct
49 Correct 222 ms 76736 KB Output is correct
50 Correct 130 ms 43864 KB Output is correct
51 Correct 129 ms 43860 KB Output is correct
52 Correct 211 ms 43940 KB Output is correct
53 Correct 187 ms 47360 KB Output is correct
54 Correct 269 ms 72276 KB Output is correct
55 Correct 16 ms 16988 KB Output is correct
56 Correct 12 ms 16216 KB Output is correct
57 Correct 55 ms 31572 KB Output is correct
58 Correct 38 ms 26568 KB Output is correct
59 Correct 84 ms 46420 KB Output is correct
60 Correct 215 ms 77280 KB Output is correct
61 Correct 164 ms 46676 KB Output is correct
62 Correct 135 ms 43848 KB Output is correct
63 Correct 249 ms 44112 KB Output is correct
64 Correct 384 ms 85328 KB Output is correct
65 Correct 370 ms 84048 KB Output is correct
66 Correct 259 ms 73300 KB Output is correct
67 Correct 126 ms 39924 KB Output is correct
68 Correct 276 ms 56816 KB Output is correct
69 Correct 284 ms 60752 KB Output is correct
70 Correct 262 ms 55248 KB Output is correct