oj.uz

Submission #1037480

# Submission time Handle Problem Language Result Execution time Memory
1037480 2024-07-28T23:55:00 Z ArthuroWich Race (IOI11_race) C++17
21 / 100
 3000 ms 18512 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;
int n, k, ans = INT_MAX, proc[200005], si[200005];
vector<pair<int, int>> adj[200005];
unordered_map<int, int> occ[2];
void dfs(int i, int p) {
    si[i] = 1;
    for (auto [j, _] : adj[i]) {
        if (proc[j] || j == p) {
            continue;
        }
        dfs(j, i);
        si[i] += si[j];
    }
}
int centroid(int i, int p, int s) {
    for (auto [j, w] : adj[i]) {
        if (proc[j] || j == p) {
            continue;
        }
        if (si[j] > s/2) {
            return centroid(j, i, s);
        }
    }
    return i;
}
void calc(int i, int p, int d, int path) {
    if (path > k) {
        return;
    }
    if (occ[1].find(path) == occ[1].end()) {
        occ[1][path] = d;
    } else {
        occ[1][path] = min(occ[1][path], d);
    }
    if (k == path) {
        ans = min(ans, d);
    } else if (occ[0].find(k-path) != occ[0].end()) {
        ans = min(ans, d+occ[0][k-path]);
    }
    for (auto [j, w] : adj[i]) {
        if (proc[j] || j == p) {
            continue;
        }
        calc(j, i, d+1, path+w);
    }
}
void decompose(int i) {
    dfs(i, -1);
    if (si[i] == 1) {
        return;
    }
    i = centroid(i, -1, si[i]);
    proc[i] = 1;
    for (auto [j, w] : adj[i]) {
        if (proc[j]) {
            continue;
        }
        calc(j, i, 1, w);
        if (occ[0].size() < occ[1].size()) {
            occ[0].swap(occ[1]);
        }
        for (auto c : occ[1]) {
            if (occ[0].find(c.first) != occ[0].end()) {
                occ[0][c.first] = min(occ[0][c.first], c.second);
            } else {
                occ[0][c.first] = c.second;
            }
        }
        occ[1].clear();
    }
    occ[0].clear();
    for (auto [j, w] : adj[i]) {
        if (proc[j]) {
            continue;
        }
        decompose(j);
    }
}
int best_path(int N, int K, int H[][2], int L[]) {
    n = N;
    k = K;
    occ[0].reserve(200000);
    occ[1].reserve(200000);
    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]});
    }
    decompose(1);
    if (ans == INT_MAX) {
        return -1;
    } else {
        return ans;
    }
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11868 KB Output is correct
2 Correct 7 ms 11896 KB Output is correct
3 Correct 7 ms 11868 KB Output is correct
4 Correct 8 ms 11868 KB Output is correct
5 Correct 9 ms 11984 KB Output is correct
6 Correct 8 ms 11864 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 11868 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 7 ms 11868 KB Output is correct
11 Correct 7 ms 11868 KB Output is correct
12 Correct 6 ms 11888 KB Output is correct
13 Correct 7 ms 11992 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 11864 KB Output is correct
16 Correct 7 ms 11984 KB Output is correct
17 Correct 7 ms 11868 KB Output is correct
18 Correct 7 ms 11868 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11868 KB Output is correct
2 Correct 7 ms 11896 KB Output is correct
3 Correct 7 ms 11868 KB Output is correct
4 Correct 8 ms 11868 KB Output is correct
5 Correct 9 ms 11984 KB Output is correct
6 Correct 8 ms 11864 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 11868 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 7 ms 11868 KB Output is correct
11 Correct 7 ms 11868 KB Output is correct
12 Correct 6 ms 11888 KB Output is correct
13 Correct 7 ms 11992 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 11864 KB Output is correct
16 Correct 7 ms 11984 KB Output is correct
17 Correct 7 ms 11868 KB Output is correct
18 Correct 7 ms 11868 KB Output is correct
19 Correct 3 ms 11864 KB Output is correct
20 Correct 8 ms 11864 KB Output is correct
21 Correct 48 ms 12040 KB Output is correct
22 Correct 49 ms 11868 KB Output is correct
23 Correct 50 ms 11868 KB Output is correct
24 Correct 47 ms 11864 KB Output is correct
25 Correct 49 ms 12036 KB Output is correct
26 Correct 47 ms 11864 KB Output is correct
27 Correct 47 ms 11864 KB Output is correct
28 Correct 46 ms 11868 KB Output is correct
29 Correct 48 ms 11868 KB Output is correct
30 Correct 41 ms 11864 KB Output is correct
31 Correct 43 ms 11868 KB Output is correct
32 Correct 47 ms 11868 KB Output is correct
33 Correct 49 ms 11864 KB Output is correct
34 Correct 49 ms 11868 KB Output is correct
35 Correct 47 ms 11868 KB Output is correct
36 Correct 43 ms 11868 KB Output is correct
37 Correct 44 ms 12036 KB Output is correct
38 Correct 49 ms 11864 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11868 KB Output is correct
2 Correct 7 ms 11896 KB Output is correct
3 Correct 7 ms 11868 KB Output is correct
4 Correct 8 ms 11868 KB Output is correct
5 Correct 9 ms 11984 KB Output is correct
6 Correct 8 ms 11864 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 11868 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 7 ms 11868 KB Output is correct
11 Correct 7 ms 11868 KB Output is correct
12 Correct 6 ms 11888 KB Output is correct
13 Correct 7 ms 11992 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 11864 KB Output is correct
16 Correct 7 ms 11984 KB Output is correct
17 Correct 7 ms 11868 KB Output is correct
18 Correct 7 ms 11868 KB Output is correct
19 Execution timed out 3034 ms 18512 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11868 KB Output is correct
2 Correct 7 ms 11896 KB Output is correct
3 Correct 7 ms 11868 KB Output is correct
4 Correct 8 ms 11868 KB Output is correct
5 Correct 9 ms 11984 KB Output is correct
6 Correct 8 ms 11864 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 11868 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 7 ms 11868 KB Output is correct
11 Correct 7 ms 11868 KB Output is correct
12 Correct 6 ms 11888 KB Output is correct
13 Correct 7 ms 11992 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 11864 KB Output is correct
16 Correct 7 ms 11984 KB Output is correct
17 Correct 7 ms 11868 KB Output is correct
18 Correct 7 ms 11868 KB Output is correct
19 Correct 3 ms 11864 KB Output is correct
20 Correct 8 ms 11864 KB Output is correct
21 Correct 48 ms 12040 KB Output is correct
22 Correct 49 ms 11868 KB Output is correct
23 Correct 50 ms 11868 KB Output is correct
24 Correct 47 ms 11864 KB Output is correct
25 Correct 49 ms 12036 KB Output is correct
26 Correct 47 ms 11864 KB Output is correct
27 Correct 47 ms 11864 KB Output is correct
28 Correct 46 ms 11868 KB Output is correct
29 Correct 48 ms 11868 KB Output is correct
30 Correct 41 ms 11864 KB Output is correct
31 Correct 43 ms 11868 KB Output is correct
32 Correct 47 ms 11868 KB Output is correct
33 Correct 49 ms 11864 KB Output is correct
34 Correct 49 ms 11868 KB Output is correct
35 Correct 47 ms 11868 KB Output is correct
36 Correct 43 ms 11868 KB Output is correct
37 Correct 44 ms 12036 KB Output is correct
38 Correct 49 ms 11864 KB Output is correct
39 Execution timed out 3034 ms 18512 KB Time limit exceeded
40 Halted 0 ms 0 KB -