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답안 #480910

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
480910 2021-10-18T16:58:03 Z Mher 경주 (Race) (IOI11_race) C++14
100 / 100
 1232 ms 61660 KB 
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <cmath>
#include <bitset>
#include <unordered_map>
#include "race.h"

using namespace std;

const int n = 200003;

int s, k;
vector<pair<int, int>> g[n];
long long h[n];
int d[n];
bool mark[n];
int ans = -1;

void answer(int x)
{
    if (ans == -1)
        ans = x;
    else
        ans = min(ans, x);
}

void calc_height(int v, int p)
{
    d[v] = 1;
    for (pair<int, int> to : g[v])
    {
        if (to.first == p || mark[to.first])
            continue;

        h[to.first] = h[v] + to.second;
        calc_height(to.first, v);
        d[v] += d[to.first];
    }
}

int center(int v, int p, int sz)
{
    int t = -1;
    for (pair<int, int> to : g[v])
    {
        if (mark[to.first] || to.first == p)
            continue;

        if (d[to.first] > sz / 2)
        {
            t = to.first;
            break;
        }
    }
    return t == -1 ? v : center(t, v, sz);
}

void get_all(int v, int p, vector<pair<long long, int>>& st, long long dp, int l)
{
    st.push_back({ dp, l });
    for (auto to : g[v])
    {
        if (to.first == p || mark[to.first])
            continue;
        get_all(to.first, v, st, dp + to.second, l + 1);
    }
}

void solve(int v)
{
    //cout << v;
    calc_height(v, -1);
    v = center(v, -1, d[v]);
    mark[v] = true;
    calc_height(v, -1);
    map<long long, int> st;
    for (auto to : g[v])
    {
        if (mark[to.first])
            continue;
        vector<pair<long long, int>> dst;
        get_all(to.first, v, dst, to.second, 1);
        for (auto x : dst)
        {
            if (x.first > k)
                continue;
            if (x.first == k)
                answer(x.second);
            else if (st.count(k - x.first))
                answer(x.second + st[k - x.first]);
        }
        for (auto x : dst)
        {
            st[x.first] = st[x.first] != 0 ? min(x.second, st[x.first]) : x.second;
        }
        solve(to.first);
    }
}

int best_path(int N, int K, int H[][2], int L[])
{
    s = N;
    k = K;
    for (int i = 0; i < s - 1; i++)
    {
        int a, b, l;
        a = H[i][0];
        b = H[i][1];
        l = L[i];
        g[a].push_back({ b, l });
        g[b].push_back({ a, l });
    }
    solve(0);
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 4 ms 4988 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 5 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 4 ms 4936 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 4 ms 4988 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 5 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 4 ms 4936 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 5 ms 5068 KB Output is correct
22 Correct 5 ms 5196 KB Output is correct
23 Correct 5 ms 5196 KB Output is correct
24 Correct 5 ms 5180 KB Output is correct
25 Correct 5 ms 5196 KB Output is correct
26 Correct 5 ms 5136 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 7 ms 5068 KB Output is correct
29 Correct 5 ms 5068 KB Output is correct
30 Correct 5 ms 5196 KB Output is correct
31 Correct 5 ms 5068 KB Output is correct
32 Correct 5 ms 5196 KB Output is correct
33 Correct 6 ms 5196 KB Output is correct
34 Correct 5 ms 5196 KB Output is correct
35 Correct 5 ms 5196 KB Output is correct
36 Correct 4 ms 5196 KB Output is correct
37 Correct 5 ms 5068 KB Output is correct
38 Correct 6 ms 5068 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 4 ms 4988 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 5 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 4 ms 4936 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 329 ms 13460 KB Output is correct
20 Correct 318 ms 13344 KB Output is correct
21 Correct 321 ms 13512 KB Output is correct
22 Correct 271 ms 13360 KB Output is correct
23 Correct 344 ms 13408 KB Output is correct
24 Correct 171 ms 12660 KB Output is correct
25 Correct 310 ms 19388 KB Output is correct
26 Correct 157 ms 20820 KB Output is correct
27 Correct 392 ms 18728 KB Output is correct
28 Correct 1203 ms 61660 KB Output is correct
29 Correct 1196 ms 60420 KB Output is correct
30 Correct 394 ms 18648 KB Output is correct
31 Correct 354 ms 18564 KB Output is correct
32 Correct 467 ms 18856 KB Output is correct
33 Correct 644 ms 21336 KB Output is correct
34 Correct 960 ms 37828 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 4 ms 4988 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 5 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 4 ms 4936 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 5 ms 5068 KB Output is correct
22 Correct 5 ms 5196 KB Output is correct
23 Correct 5 ms 5196 KB Output is correct
24 Correct 5 ms 5180 KB Output is correct
25 Correct 5 ms 5196 KB Output is correct
26 Correct 5 ms 5136 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 7 ms 5068 KB Output is correct
29 Correct 5 ms 5068 KB Output is correct
30 Correct 5 ms 5196 KB Output is correct
31 Correct 5 ms 5068 KB Output is correct
32 Correct 5 ms 5196 KB Output is correct
33 Correct 6 ms 5196 KB Output is correct
34 Correct 5 ms 5196 KB Output is correct
35 Correct 5 ms 5196 KB Output is correct
36 Correct 4 ms 5196 KB Output is correct
37 Correct 5 ms 5068 KB Output is correct
38 Correct 6 ms 5068 KB Output is correct
39 Correct 329 ms 13460 KB Output is correct
40 Correct 318 ms 13344 KB Output is correct
41 Correct 321 ms 13512 KB Output is correct
42 Correct 271 ms 13360 KB Output is correct
43 Correct 344 ms 13408 KB Output is correct
44 Correct 171 ms 12660 KB Output is correct
45 Correct 310 ms 19388 KB Output is correct
46 Correct 157 ms 20820 KB Output is correct
47 Correct 392 ms 18728 KB Output is correct
48 Correct 1203 ms 61660 KB Output is correct
49 Correct 1196 ms 60420 KB Output is correct
50 Correct 394 ms 18648 KB Output is correct
51 Correct 354 ms 18564 KB Output is correct
52 Correct 467 ms 18856 KB Output is correct
53 Correct 644 ms 21336 KB Output is correct
54 Correct 960 ms 37828 KB Output is correct
55 Correct 27 ms 6476 KB Output is correct
56 Correct 20 ms 5988 KB Output is correct
57 Correct 189 ms 13116 KB Output is correct
58 Correct 69 ms 11860 KB Output is correct
59 Correct 401 ms 30372 KB Output is correct
60 Correct 1232 ms 58992 KB Output is correct
61 Correct 436 ms 20468 KB Output is correct
62 Correct 367 ms 18756 KB Output is correct
63 Correct 449 ms 18740 KB Output is correct
64 Correct 1120 ms 30736 KB Output is correct
65 Correct 974 ms 34764 KB Output is correct
66 Correct 1220 ms 57964 KB Output is correct
67 Correct 164 ms 18748 KB Output is correct
68 Correct 579 ms 30484 KB Output is correct
69 Correct 566 ms 31244 KB Output is correct
70 Correct 525 ms 29640 KB Output is correct