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답안 #1112058

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1112058 2024-11-13T15:20:42 Z FucKanh 경주 (Race) (IOI11_race) C++14
21 / 100
 128 ms 72008 KB 
#include <bits/stdc++.h>
#include <race.h>
#define ll long long
#define pii pair<long long,long long>

using namespace std;

const ll maxn = 5e5 + 2;

ll sz[maxn],h[maxn],k;
vector<pii> a[maxn];
ll ans = LLONG_MAX;
map<ll,ll> mp[maxn];

void dfs(ll u, ll w, ll pa) {
    assert(h[u]!=0);
    for (pii tmp : a[u]) {
        ll wv,v; tie(v,wv) = tmp;
        if (v==pa) continue;
        h[v] = h[u] + 1;
        dfs(v,w+wv,u);

        mp[v][w+wv] = h[v];

        if (mp[u].size() < mp[v].size()) swap(mp[u],mp[v]);

        for (pii val : mp[v]) {
            if (val.second==0) continue;
            if (val.first - w < k && mp[u][k-val.first+2*w] != 0) {
                ans = min(ans, mp[u][k-val.first+2*w] - h[u] + val.second - h[u]);
            }
        }

        mp[u].insert(mp[v].begin(),mp[v].end());
        if (mp[u][w + k] != 0) {
            ans = min(ans, mp[u][w+k]-h[u]);
        }
    }

}

int best_path(int _n, int _k, int _h[][2], int _L[])
{
    k = _k;
    for (ll i = 0; i < _n - 1; i++){
        ll x = _h[i][0], y = _h[i][1];
        ll w = _L[i];
        a[x].push_back({y,w});
        a[y].push_back({x,w});
    }
    h[0] = 1;
    dfs(0,0,-1);
    assert(ans > 0);
    return ans == LLONG_MAX ? -1 : ans;
}

//signed main() {
//    int N = 11, K = 12;
//    int H[10][2] = {
//    {0,1},
//    {0,2},
//    {0,8},
//    {1,3},
//    {3,7},
//    {2,4},
//    {0,5},
//    {5,6},
//    {8,9},
//    {9,10},
//    };
//    int L[10] = {1,1,1,2,3,2,1,2,2,3};
//    cout << best_path(N,K,H,L);
//}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 39380 KB Output is correct
2 Correct 6 ms 39392 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 6 ms 39464 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 7 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 6 ms 39248 KB Output is correct
10 Correct 6 ms 39416 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 9 ms 39428 KB Output is correct
14 Correct 7 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 7 ms 39248 KB Output is correct
17 Correct 7 ms 39416 KB Output is correct
18 Correct 7 ms 39452 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 39380 KB Output is correct
2 Correct 6 ms 39392 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 6 ms 39464 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 7 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 6 ms 39248 KB Output is correct
10 Correct 6 ms 39416 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 9 ms 39428 KB Output is correct
14 Correct 7 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 7 ms 39248 KB Output is correct
17 Correct 7 ms 39416 KB Output is correct
18 Correct 7 ms 39452 KB Output is correct
19 Correct 7 ms 39248 KB Output is correct
20 Correct 8 ms 39248 KB Output is correct
21 Correct 8 ms 39760 KB Output is correct
22 Correct 9 ms 39700 KB Output is correct
23 Correct 7 ms 39760 KB Output is correct
24 Correct 7 ms 39760 KB Output is correct
25 Correct 8 ms 39904 KB Output is correct
26 Correct 8 ms 39760 KB Output is correct
27 Correct 8 ms 39504 KB Output is correct
28 Correct 8 ms 39760 KB Output is correct
29 Correct 9 ms 40032 KB Output is correct
30 Correct 9 ms 40016 KB Output is correct
31 Correct 8 ms 39888 KB Output is correct
32 Correct 10 ms 39892 KB Output is correct
33 Correct 9 ms 40016 KB Output is correct
34 Correct 8 ms 39700 KB Output is correct
35 Correct 8 ms 39760 KB Output is correct
36 Correct 8 ms 39504 KB Output is correct
37 Correct 9 ms 39748 KB Output is correct
38 Correct 7 ms 39760 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 39380 KB Output is correct
2 Correct 6 ms 39392 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 6 ms 39464 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 7 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 6 ms 39248 KB Output is correct
10 Correct 6 ms 39416 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 9 ms 39428 KB Output is correct
14 Correct 7 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 7 ms 39248 KB Output is correct
17 Correct 7 ms 39416 KB Output is correct
18 Correct 7 ms 39452 KB Output is correct
19 Incorrect 128 ms 72008 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 39380 KB Output is correct
2 Correct 6 ms 39392 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 6 ms 39464 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 7 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 6 ms 39248 KB Output is correct
10 Correct 6 ms 39416 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 9 ms 39428 KB Output is correct
14 Correct 7 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 7 ms 39248 KB Output is correct
17 Correct 7 ms 39416 KB Output is correct
18 Correct 7 ms 39452 KB Output is correct
19 Correct 7 ms 39248 KB Output is correct
20 Correct 8 ms 39248 KB Output is correct
21 Correct 8 ms 39760 KB Output is correct
22 Correct 9 ms 39700 KB Output is correct
23 Correct 7 ms 39760 KB Output is correct
24 Correct 7 ms 39760 KB Output is correct
25 Correct 8 ms 39904 KB Output is correct
26 Correct 8 ms 39760 KB Output is correct
27 Correct 8 ms 39504 KB Output is correct
28 Correct 8 ms 39760 KB Output is correct
29 Correct 9 ms 40032 KB Output is correct
30 Correct 9 ms 40016 KB Output is correct
31 Correct 8 ms 39888 KB Output is correct
32 Correct 10 ms 39892 KB Output is correct
33 Correct 9 ms 40016 KB Output is correct
34 Correct 8 ms 39700 KB Output is correct
35 Correct 8 ms 39760 KB Output is correct
36 Correct 8 ms 39504 KB Output is correct
37 Correct 9 ms 39748 KB Output is correct
38 Correct 7 ms 39760 KB Output is correct
39 Incorrect 128 ms 72008 KB Output isn't correct
40 Halted 0 ms 0 KB -