oj.uz

답안 #894610

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
894610 2023-12-28T14:22:01 Z IWKR 경주 (Race) (IOI11_race) C++17
100 / 100
 332 ms 42812 KB 
#include <bits/stdc++.h>
#include "race.h"
using namespace std;

vector<pair<int, int>> adjlist[200000];
int dist[1000001];
int subsz[200000], level[200000];
vector<pair<int, int>> v;
vector<int> v2;
int k, ans;

void dfs(int x, int p) {
    subsz[x] = 1;
    for (auto i: adjlist[x]) {
        if (i.first == p || level[i.first] != 0) {
            continue;
        }
        dfs(i.first, x);
        subsz[x] += subsz[i.first];
    }
}

int centroid(int x, int p, int treesz) {
    for (auto i: adjlist[x]) {
        if (i.first == p || level[i.first] != 0) {
            continue;
        }
        if (treesz < subsz[i.first] * 2) {
            return centroid(i.first, x, treesz);
        }
    }
    return x;
}

void dfs2(int x, int p, int depth, int cost) {
    if (cost > k) {
        return;
    }
    v.push_back({cost, depth});
    for (auto i: adjlist[x]) {
        if (i.first == p || level[i.first] != 0) {
            continue;
        }
        dfs2(i.first, x, depth + 1, cost + i.second);
    }
}

void decomp(int x) {
    dfs(x, -1);
    int cent = centroid(x, -1, subsz[x]);
    level[cent] = 1;
    dist[0] = 0;
    for (auto i: adjlist[cent]) {
		if (level[i.first] != 0) {
			continue;
		}
        dfs2(i.first, -1, 1, i.second);
        for (auto j: v) {
            if (dist[k - j.first] == INT_MAX) {
                continue;
            }
            ans = min(ans, dist[k - j.first] + j.second);
        }
        for (auto j: v) {
            v2.push_back(j.first);
            dist[j.first] = min(dist[j.first], j.second);
        }
        v.clear();
    }
    for (auto i: v2) {
        dist[i] = INT_MAX;
    }
    v2.clear();
    for (auto i: adjlist[cent]) {
        if (level[i.first] == 0) {
            decomp(i.first);
        }
    }
}

int best_path(int N, int K, int H[][2], int L[]) {
    for (int i = 0; i < N - 1; i++) {
        adjlist[H[i][0]].push_back({H[i][1], L[i]});
        adjlist[H[i][1]].push_back({H[i][0], L[i]});
    }
    k = K;
    for (int i = 1; i <= k; i++) {
        dist[i] = INT_MAX;
    }
    ans = N;
    decomp(0);
    if (ans == N) {
        return -1;
    } else {
        return ans;
    }
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12124 KB Output is correct
2 Correct 3 ms 12196 KB Output is correct
3 Correct 3 ms 12124 KB Output is correct
4 Correct 3 ms 12188 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 11992 KB Output is correct
9 Correct 2 ms 12196 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 2 ms 12124 KB Output is correct
13 Correct 2 ms 12056 KB Output is correct
14 Correct 3 ms 12124 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 2 ms 12124 KB Output is correct
17 Correct 2 ms 12124 KB Output is correct
18 Correct 2 ms 12124 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12124 KB Output is correct
2 Correct 3 ms 12196 KB Output is correct
3 Correct 3 ms 12124 KB Output is correct
4 Correct 3 ms 12188 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 11992 KB Output is correct
9 Correct 2 ms 12196 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 2 ms 12124 KB Output is correct
13 Correct 2 ms 12056 KB Output is correct
14 Correct 3 ms 12124 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 2 ms 12124 KB Output is correct
17 Correct 2 ms 12124 KB Output is correct
18 Correct 2 ms 12124 KB Output is correct
19 Correct 2 ms 12124 KB Output is correct
20 Correct 3 ms 12124 KB Output is correct
21 Correct 3 ms 12124 KB Output is correct
22 Correct 3 ms 14256 KB Output is correct
23 Correct 3 ms 14172 KB Output is correct
24 Correct 4 ms 14172 KB Output is correct
25 Correct 4 ms 14172 KB Output is correct
26 Correct 3 ms 14172 KB Output is correct
27 Correct 4 ms 14172 KB Output is correct
28 Correct 3 ms 12124 KB Output is correct
29 Correct 4 ms 14172 KB Output is correct
30 Correct 4 ms 14172 KB Output is correct
31 Correct 3 ms 14172 KB Output is correct
32 Correct 3 ms 14252 KB Output is correct
33 Correct 4 ms 14168 KB Output is correct
34 Correct 4 ms 14168 KB Output is correct
35 Correct 3 ms 14172 KB Output is correct
36 Correct 4 ms 14168 KB Output is correct
37 Correct 4 ms 14176 KB Output is correct
38 Correct 3 ms 14256 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12124 KB Output is correct
2 Correct 3 ms 12196 KB Output is correct
3 Correct 3 ms 12124 KB Output is correct
4 Correct 3 ms 12188 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 11992 KB Output is correct
9 Correct 2 ms 12196 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 2 ms 12124 KB Output is correct
13 Correct 2 ms 12056 KB Output is correct
14 Correct 3 ms 12124 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 2 ms 12124 KB Output is correct
17 Correct 2 ms 12124 KB Output is correct
18 Correct 2 ms 12124 KB Output is correct
19 Correct 82 ms 19628 KB Output is correct
20 Correct 90 ms 19560 KB Output is correct
21 Correct 90 ms 19832 KB Output is correct
22 Correct 80 ms 20412 KB Output is correct
23 Correct 59 ms 19536 KB Output is correct
24 Correct 46 ms 19540 KB Output is correct
25 Correct 98 ms 22852 KB Output is correct
26 Correct 75 ms 27636 KB Output is correct
27 Correct 112 ms 24916 KB Output is correct
28 Correct 203 ms 39248 KB Output is correct
29 Correct 179 ms 38204 KB Output is correct
30 Correct 108 ms 24768 KB Output is correct
31 Correct 149 ms 24964 KB Output is correct
32 Correct 131 ms 24896 KB Output is correct
33 Correct 151 ms 23796 KB Output is correct
34 Correct 118 ms 24660 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12124 KB Output is correct
2 Correct 3 ms 12196 KB Output is correct
3 Correct 3 ms 12124 KB Output is correct
4 Correct 3 ms 12188 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 11992 KB Output is correct
9 Correct 2 ms 12196 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 2 ms 12124 KB Output is correct
13 Correct 2 ms 12056 KB Output is correct
14 Correct 3 ms 12124 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 2 ms 12124 KB Output is correct
17 Correct 2 ms 12124 KB Output is correct
18 Correct 2 ms 12124 KB Output is correct
19 Correct 2 ms 12124 KB Output is correct
20 Correct 3 ms 12124 KB Output is correct
21 Correct 3 ms 12124 KB Output is correct
22 Correct 3 ms 14256 KB Output is correct
23 Correct 3 ms 14172 KB Output is correct
24 Correct 4 ms 14172 KB Output is correct
25 Correct 4 ms 14172 KB Output is correct
26 Correct 3 ms 14172 KB Output is correct
27 Correct 4 ms 14172 KB Output is correct
28 Correct 3 ms 12124 KB Output is correct
29 Correct 4 ms 14172 KB Output is correct
30 Correct 4 ms 14172 KB Output is correct
31 Correct 3 ms 14172 KB Output is correct
32 Correct 3 ms 14252 KB Output is correct
33 Correct 4 ms 14168 KB Output is correct
34 Correct 4 ms 14168 KB Output is correct
35 Correct 3 ms 14172 KB Output is correct
36 Correct 4 ms 14168 KB Output is correct
37 Correct 4 ms 14176 KB Output is correct
38 Correct 3 ms 14256 KB Output is correct
39 Correct 82 ms 19628 KB Output is correct
40 Correct 90 ms 19560 KB Output is correct
41 Correct 90 ms 19832 KB Output is correct
42 Correct 80 ms 20412 KB Output is correct
43 Correct 59 ms 19536 KB Output is correct
44 Correct 46 ms 19540 KB Output is correct
45 Correct 98 ms 22852 KB Output is correct
46 Correct 75 ms 27636 KB Output is correct
47 Correct 112 ms 24916 KB Output is correct
48 Correct 203 ms 39248 KB Output is correct
49 Correct 179 ms 38204 KB Output is correct
50 Correct 108 ms 24768 KB Output is correct
51 Correct 149 ms 24964 KB Output is correct
52 Correct 131 ms 24896 KB Output is correct
53 Correct 151 ms 23796 KB Output is correct
54 Correct 118 ms 24660 KB Output is correct
55 Correct 7 ms 12636 KB Output is correct
56 Correct 11 ms 12636 KB Output is correct
57 Correct 58 ms 20684 KB Output is correct
58 Correct 28 ms 20172 KB Output is correct
59 Correct 71 ms 27860 KB Output is correct
60 Correct 332 ms 42812 KB Output is correct
61 Correct 104 ms 25376 KB Output is correct
62 Correct 116 ms 28116 KB Output is correct
63 Correct 141 ms 28224 KB Output is correct
64 Correct 220 ms 29384 KB Output is correct
65 Correct 154 ms 25680 KB Output is correct
66 Correct 205 ms 38124 KB Output is correct
67 Correct 71 ms 29236 KB Output is correct
68 Correct 134 ms 28364 KB Output is correct
69 Correct 149 ms 28508 KB Output is correct
70 Correct 122 ms 27976 KB Output is correct