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답안 #1026149

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1026149 2024-07-17T15:58:55 Z vanea 경주 (Race) (IOI11_race) C++17
9 / 100
 3000 ms 20060 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, bk = 0;
int d[mxK], last[mxN];

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, p);
    }
    return node;
}

void get_min(int node, int p, bool filling, int dist, int s) {
    if(s > k) return ;
    if(filling) {
        if(last[s] != bk) {
            last[s] = bk;
            d[s] = dist;
        }
        else {
            d[s] = min(d[s], dist);
        }
    }
    else {
        if(last[k-s] == bk) {
            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);
    }
}

void build(int node) {
    get_sz(node, -1);
    int c = get_c(node, -1, sz[node]);
    vis[c] = true;
    bk++;
    last[0] = bk;
    for(auto [it, w] : adj[c]) {
        if(vis[it]) continue;
        get_min(it, c, 0, 1, w);
        get_min(it, c, 1, 1, w);
    }
    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(11, 12, {{0, 1}, {0, 2}, {2, 3}, {3, 4}, {4, 5}, {0, 6},
                      {6, 7}, {6, 8}, {8, 9}, {8, 10}},
                      {3, 4, 5, 4, 6, 3, 2, 5, 6, 7});
}*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 10584 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 1 ms 10584 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 1 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 1 ms 10684 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 1 ms 10588 KB Output is correct
17 Correct 2 ms 10840 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 10584 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 1 ms 10584 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 1 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 1 ms 10684 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 1 ms 10588 KB Output is correct
17 Correct 2 ms 10840 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct
19 Correct 1 ms 10588 KB Output is correct
20 Correct 1 ms 10840 KB Output is correct
21 Correct 2 ms 10588 KB Output is correct
22 Correct 3 ms 13916 KB Output is correct
23 Correct 3 ms 13148 KB Output is correct
24 Correct 3 ms 13660 KB Output is correct
25 Correct 2 ms 12380 KB Output is correct
26 Correct 2 ms 12636 KB Output is correct
27 Correct 2 ms 10588 KB Output is correct
28 Correct 2 ms 12732 KB Output is correct
29 Correct 2 ms 11612 KB Output is correct
30 Incorrect 2 ms 11868 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 10584 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 1 ms 10584 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 1 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 1 ms 10684 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 1 ms 10588 KB Output is correct
17 Correct 2 ms 10840 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct
19 Correct 472 ms 16576 KB Output is correct
20 Correct 475 ms 16720 KB Output is correct
21 Correct 804 ms 16580 KB Output is correct
22 Correct 74 ms 16452 KB Output is correct
23 Correct 40 ms 16728 KB Output is correct
24 Correct 31 ms 16732 KB Output is correct
25 Execution timed out 3070 ms 20060 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 10584 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 1 ms 10584 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 1 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 1 ms 10684 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 1 ms 10588 KB Output is correct
17 Correct 2 ms 10840 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct
19 Correct 1 ms 10588 KB Output is correct
20 Correct 1 ms 10840 KB Output is correct
21 Correct 2 ms 10588 KB Output is correct
22 Correct 3 ms 13916 KB Output is correct
23 Correct 3 ms 13148 KB Output is correct
24 Correct 3 ms 13660 KB Output is correct
25 Correct 2 ms 12380 KB Output is correct
26 Correct 2 ms 12636 KB Output is correct
27 Correct 2 ms 10588 KB Output is correct
28 Correct 2 ms 12732 KB Output is correct
29 Correct 2 ms 11612 KB Output is correct
30 Incorrect 2 ms 11868 KB Output isn't correct
31 Halted 0 ms 0 KB -