oj.uz

답안 #272742

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
272742 2020-08-18T15:00:57 Z toonewbie 경주 (Race) (IOI11_race) C++17
100 / 100
 1350 ms 50412 KB 
#include <bits/stdc++.h>
#include "race.h"

#define F first
#define S second

using namespace std;

const int N = 200005;

int n, k;
vector <int> g[N];
vector <pair <int, int>> gw[N]; /// just for simplicity in the code
int del[N], sub[N];
int res = N;

void calc(int v, int p = -1) {
    sub[v] = 1;
    for (int i : g[v]) {
        if (i != p && del[i] == 0) {
            calc(i, v);
            sub[v] += sub[i];
        }
    }
}
int centroid(int v, int r, int p = -1) {
    for (int i : g[v]) {
        if (i != p && del[i] == 0 && sub[i] > r) {
            return centroid(i, r, v);
        }
    }
    return v;
}
map<int, int> dp;
vector <pair <int, int>> vec;
void dfs(int v, int p = -1, int cur = 0, int dis = 0) {
    if (cur > k) return;
    if (dp.count(k - cur)) {
        res = min(res, dp[k - cur] + dis);
    }
    for (auto i : gw[v]) {
        if (i.F != p && del[i.F] == 0) {
            dfs(i.F, v, cur + i.S, dis + 1);
        }
    }
    vec.push_back({cur, dis});
}
void decompose(int v, int p = -1) {
    calc(v);
    int c = centroid(v, sub[v] >> 1);
    del[c] = 1;
    dp.clear();
    dp[0] = 0;
    for (auto i : gw[c]) {
        if (del[i.F] == 1) continue;
        vec.clear();
        dfs(i.F, c, i.S, 1);
        for (auto j : vec) {
            if (!dp.count(j.F)) dp[j.F] = j.S;
            else dp[j.F] = min(dp[j.F], j.S);
        }
    }
    for (int i : g[c]) {
        if (i != p && del[i] == 0) {
            decompose(i, c);
        }
    }
}

int best_path(int N, int K, int H[][2], int L[]) {
    n = N, k = K;
    for (int i = 0; i < n - 1; i++) {
        g[H[i][0]].push_back(H[i][1]);
        g[H[i][1]].push_back(H[i][0]);
        gw[H[i][0]].push_back({H[i][1], L[i]});
        gw[H[i][1]].push_back({H[i][0], L[i]});
    }
    decompose(0);
    if (res > n) res = -1;
    return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 6 ms 9728 KB Output is correct
11 Correct 8 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 6 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 6 ms 9728 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 6 ms 9728 KB Output is correct
11 Correct 8 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 6 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 6 ms 9728 KB Output is correct
19 Correct 8 ms 9856 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 9 ms 10112 KB Output is correct
22 Correct 7 ms 9856 KB Output is correct
23 Correct 7 ms 9856 KB Output is correct
24 Correct 8 ms 9856 KB Output is correct
25 Correct 9 ms 9856 KB Output is correct
26 Correct 8 ms 9856 KB Output is correct
27 Correct 8 ms 9856 KB Output is correct
28 Correct 9 ms 9856 KB Output is correct
29 Correct 8 ms 9856 KB Output is correct
30 Correct 10 ms 9856 KB Output is correct
31 Correct 9 ms 9856 KB Output is correct
32 Correct 8 ms 9856 KB Output is correct
33 Correct 9 ms 9856 KB Output is correct
34 Correct 8 ms 9856 KB Output is correct
35 Correct 10 ms 9856 KB Output is correct
36 Correct 8 ms 9856 KB Output is correct
37 Correct 8 ms 9856 KB Output is correct
38 Correct 8 ms 9856 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 6 ms 9728 KB Output is correct
11 Correct 8 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 6 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 6 ms 9728 KB Output is correct
19 Correct 333 ms 20044 KB Output is correct
20 Correct 288 ms 19960 KB Output is correct
21 Correct 340 ms 20212 KB Output is correct
22 Correct 322 ms 20468 KB Output is correct
23 Correct 177 ms 20220 KB Output is correct
24 Correct 166 ms 20316 KB Output is correct
25 Correct 295 ms 22780 KB Output is correct
26 Correct 165 ms 26224 KB Output is correct
27 Correct 369 ms 30968 KB Output is correct
28 Correct 622 ms 41724 KB Output is correct
29 Correct 557 ms 40956 KB Output is correct
30 Correct 382 ms 30968 KB Output is correct
31 Correct 376 ms 31096 KB Output is correct
32 Correct 455 ms 31080 KB Output is correct
33 Correct 508 ms 29432 KB Output is correct
34 Correct 363 ms 30072 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 6 ms 9728 KB Output is correct
11 Correct 8 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 6 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 6 ms 9728 KB Output is correct
19 Correct 8 ms 9856 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 9 ms 10112 KB Output is correct
22 Correct 7 ms 9856 KB Output is correct
23 Correct 7 ms 9856 KB Output is correct
24 Correct 8 ms 9856 KB Output is correct
25 Correct 9 ms 9856 KB Output is correct
26 Correct 8 ms 9856 KB Output is correct
27 Correct 8 ms 9856 KB Output is correct
28 Correct 9 ms 9856 KB Output is correct
29 Correct 8 ms 9856 KB Output is correct
30 Correct 10 ms 9856 KB Output is correct
31 Correct 9 ms 9856 KB Output is correct
32 Correct 8 ms 9856 KB Output is correct
33 Correct 9 ms 9856 KB Output is correct
34 Correct 8 ms 9856 KB Output is correct
35 Correct 10 ms 9856 KB Output is correct
36 Correct 8 ms 9856 KB Output is correct
37 Correct 8 ms 9856 KB Output is correct
38 Correct 8 ms 9856 KB Output is correct
39 Correct 333 ms 20044 KB Output is correct
40 Correct 288 ms 19960 KB Output is correct
41 Correct 340 ms 20212 KB Output is correct
42 Correct 322 ms 20468 KB Output is correct
43 Correct 177 ms 20220 KB Output is correct
44 Correct 166 ms 20316 KB Output is correct
45 Correct 295 ms 22780 KB Output is correct
46 Correct 165 ms 26224 KB Output is correct
47 Correct 369 ms 30968 KB Output is correct
48 Correct 622 ms 41724 KB Output is correct
49 Correct 557 ms 40956 KB Output is correct
50 Correct 382 ms 30968 KB Output is correct
51 Correct 376 ms 31096 KB Output is correct
52 Correct 455 ms 31080 KB Output is correct
53 Correct 508 ms 29432 KB Output is correct
54 Correct 363 ms 30072 KB Output is correct
55 Correct 33 ms 11008 KB Output is correct
56 Correct 23 ms 10880 KB Output is correct
57 Correct 180 ms 20464 KB Output is correct
58 Correct 72 ms 20324 KB Output is correct
59 Correct 351 ms 29408 KB Output is correct
60 Correct 1198 ms 50412 KB Output is correct
61 Correct 469 ms 31480 KB Output is correct
62 Correct 486 ms 31312 KB Output is correct
63 Correct 604 ms 31228 KB Output is correct
64 Correct 1350 ms 36328 KB Output is correct
65 Correct 438 ms 31480 KB Output is correct
66 Correct 909 ms 39304 KB Output is correct
67 Correct 302 ms 32088 KB Output is correct
68 Correct 697 ms 35576 KB Output is correct
69 Correct 728 ms 35576 KB Output is correct
70 Correct 608 ms 34424 KB Output is correct