oj.uz

답안 #900118

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
900118 2024-01-07T16:46:54 Z Macker 경주 (Race) (IOI11_race) C++17
100 / 100
 1100 ms 55056 KB 
#include "race.h"
#include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
typedef long double ld;
#define all(v) v.begin(), v.end()

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")

vector<vector<pair<int, int>>> adj;
vector<int> centroid;
vector<int> sz;
int k;

int szDfs(int a, int p){
    sz[a] = 1;
    for (auto &[b, _] : adj[a]) {
        if(b == p || centroid[b]) continue;
        sz[a] += szDfs(b, a);
    }
    return sz[a];
}

int getCentroid(int a, int p, int curSz){
    for (auto &[b, _] : adj[a]) {
        if(b == p || centroid[b]) continue;
        if(sz[b] * 2 > curSz) return getCentroid(b, a, curSz);
    }
    return a;
}

void dDfs(int a, int p, int d, int dc, vector<pair<int, int>> &dst){
    dst.push_back({dc, d});
    for (auto &[b, c] : adj[a]) {
        if(b == p || centroid[b]) continue;
        dDfs(b, a, d + 1, dc + c, dst);
    }
}

int getBest(int a){
    multiset<pair<int, int>> cur;
    cur.insert({0, 0});
    vector<vector<pair<int, int>>> ch;
    int res = INT_MAX;

    int ctd = getCentroid(a, a, szDfs(a, a));
    centroid[ctd] = true;

    for (auto [b, c] : adj[ctd]) {
        if(centroid[b]) continue;
        ch.push_back({});
        dDfs(b, b, 1, c, ch.back());
    }

    for (auto &&i : ch) for (auto &&j : i){
        cur.insert(j);
    }

    for (auto &&i : ch) {
        for (auto &&j : i) cur.erase(cur.find(j));
        for (auto &&j : i) {
            if(cur.lower_bound({k - j.first, 0}) == cur.end()) continue;
            pair<int, int> x = *cur.lower_bound({k - j.first, 0});
            if(x.first == k - j.first){
                res = min(res, x.second + j.second);
            }
        }
        for (auto &&j : i) cur.insert(j);
    }

    for (auto &[b, _] : adj[ctd]) {
        if(centroid[b]) continue;
        res = min(res, getBest(b));
    }
    
    return res;
}

int best_path(int N, int K, int H[][2], int L[])
{
    k = K;
    adj.assign(N, {});
    sz.assign(N, 0);
    centroid.assign(N, false);
    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]});
    }
    int ret = getBest(0);
    if(ret == INT_MAX) return -1;
    return ret;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2552 KB Output is correct
9 Correct 1 ms 2732 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2552 KB Output is correct
9 Correct 1 ms 2732 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 2 ms 2652 KB Output is correct
22 Correct 3 ms 2652 KB Output is correct
23 Correct 3 ms 2652 KB Output is correct
24 Correct 2 ms 2652 KB Output is correct
25 Correct 2 ms 2664 KB Output is correct
26 Correct 2 ms 2652 KB Output is correct
27 Correct 2 ms 2652 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 3 ms 2652 KB Output is correct
30 Correct 3 ms 2652 KB Output is correct
31 Correct 2 ms 2652 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 3 ms 2652 KB Output is correct
34 Correct 2 ms 2652 KB Output is correct
35 Correct 2 ms 2652 KB Output is correct
36 Correct 2 ms 2500 KB Output is correct
37 Correct 2 ms 2648 KB Output is correct
38 Correct 2 ms 2652 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2552 KB Output is correct
9 Correct 1 ms 2732 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 474 ms 22864 KB Output is correct
20 Correct 459 ms 23064 KB Output is correct
21 Correct 463 ms 23368 KB Output is correct
22 Correct 396 ms 22964 KB Output is correct
23 Correct 551 ms 22280 KB Output is correct
24 Correct 282 ms 20172 KB Output is correct
25 Correct 467 ms 27968 KB Output is correct
26 Correct 347 ms 29784 KB Output is correct
27 Correct 460 ms 33084 KB Output is correct
28 Correct 1045 ms 55056 KB Output is correct
29 Correct 1066 ms 54316 KB Output is correct
30 Correct 461 ms 32908 KB Output is correct
31 Correct 459 ms 33092 KB Output is correct
32 Correct 487 ms 32896 KB Output is correct
33 Correct 788 ms 41404 KB Output is correct
34 Correct 1000 ms 40892 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2552 KB Output is correct
9 Correct 1 ms 2732 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 2 ms 2652 KB Output is correct
22 Correct 3 ms 2652 KB Output is correct
23 Correct 3 ms 2652 KB Output is correct
24 Correct 2 ms 2652 KB Output is correct
25 Correct 2 ms 2664 KB Output is correct
26 Correct 2 ms 2652 KB Output is correct
27 Correct 2 ms 2652 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 3 ms 2652 KB Output is correct
30 Correct 3 ms 2652 KB Output is correct
31 Correct 2 ms 2652 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 3 ms 2652 KB Output is correct
34 Correct 2 ms 2652 KB Output is correct
35 Correct 2 ms 2652 KB Output is correct
36 Correct 2 ms 2500 KB Output is correct
37 Correct 2 ms 2648 KB Output is correct
38 Correct 2 ms 2652 KB Output is correct
39 Correct 474 ms 22864 KB Output is correct
40 Correct 459 ms 23064 KB Output is correct
41 Correct 463 ms 23368 KB Output is correct
42 Correct 396 ms 22964 KB Output is correct
43 Correct 551 ms 22280 KB Output is correct
44 Correct 282 ms 20172 KB Output is correct
45 Correct 467 ms 27968 KB Output is correct
46 Correct 347 ms 29784 KB Output is correct
47 Correct 460 ms 33084 KB Output is correct
48 Correct 1045 ms 55056 KB Output is correct
49 Correct 1066 ms 54316 KB Output is correct
50 Correct 461 ms 32908 KB Output is correct
51 Correct 459 ms 33092 KB Output is correct
52 Correct 487 ms 32896 KB Output is correct
53 Correct 788 ms 41404 KB Output is correct
54 Correct 1000 ms 40892 KB Output is correct
55 Correct 28 ms 4184 KB Output is correct
56 Correct 28 ms 4396 KB Output is correct
57 Correct 466 ms 22316 KB Output is correct
58 Correct 125 ms 22940 KB Output is correct
59 Correct 399 ms 29776 KB Output is correct
60 Correct 1100 ms 54240 KB Output is correct
61 Correct 472 ms 32948 KB Output is correct
62 Correct 464 ms 33072 KB Output is correct
63 Correct 501 ms 32852 KB Output is correct
64 Correct 1055 ms 42948 KB Output is correct
65 Correct 915 ms 41852 KB Output is correct
66 Correct 1036 ms 52408 KB Output is correct
67 Correct 270 ms 43684 KB Output is correct
68 Correct 550 ms 38812 KB Output is correct
69 Correct 545 ms 39212 KB Output is correct
70 Correct 488 ms 37256 KB Output is correct