oj.uz

Submission #564368

# Submission time Handle Problem Language Result Execution time Memory
564368 2022-05-19T04:29:46 Z KoD File Paths (BOI15_fil) C++17
100 / 100
 98 ms 29740 KB 
#include <bits/stdc++.h>

using std::vector;

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int N, M, K, S;
    std::cin >> N >> M >> K >> S;
    K -= 1, S += 1;
    vector<int> parent(N + M + 1), depth(N + M + 1);
    vector<vector<int>> children(N + 1);
    for (int i = 1; i <= N; ++i) {
        int p, l;
        std::cin >> p >> l;
        parent[i] = p;
        depth[i] = depth[p] + l + 1;
        children[p].push_back(i);
    }
    for (int i = N + 1; i <= N + M; ++i) {
        int p, l;
        std::cin >> p >> l;
        parent[i] = p;
        depth[i] = depth[p] + l;
        children[p].push_back(i);
    }
    vector<char> exists(K + 1);
    vector<vector<int>> list(N + 1);
    for (int i = 0; i <= N; ++i) {
        exists[depth[i]] = true;
        for (int j = i; j != 0;) {
            j = parent[j];
            const int len = depth[i] - depth[j] + S;
            if (len <= K) {
                list[j].push_back(len);
            }
        }
    }
    vector<char> ans(M);
    vector<int> anc, count(K + 1);
    auto dfs = [&](auto&& dfs, const int u) -> void {
        if (u > N) {
            ans[u - (N + 1)] = [&] {
                const int goal = K - depth[u];
                if (goal % S == 0) {
                    return true;
                }
                for (const int v : anc) {
                    const int shortcut = goal - S + depth[v];
                    if (shortcut >= 0 and exists[shortcut]) {
                        return true;
                    }
                }
                for (int d = 1; d * d <= goal; ++d) {
                    if (goal % d == 0) {
                        if (count[d] > 0 or count[goal / d] > 0) {
                            return true;
                        }
                    }
                }
                return false;
            }();
        } else {
            anc.push_back(u);
            for (const int x : list[u]) {
                count[x] += 1;
            }
            for (const int v : children[u]) {
                dfs(dfs, v);
            }
            anc.pop_back();
            for (const int x : list[u]) {
                count[x] -= 1;
            }
        }
    };
    dfs(dfs, 0);
    for (const char c : ans) {
        std::cout << (c ? "YES" : "NO") << '\n';
    }
    return 0;
}

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 852 KB Output is correct
4 Correct 2 ms 1220 KB Output is correct
5 Correct 4 ms 5332 KB Output is correct
6 Correct 4 ms 5204 KB Output is correct
7 Correct 6 ms 5844 KB Output is correct
8 Correct 3 ms 5204 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 4 ms 4820 KB Output is correct
12 Correct 4 ms 5204 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5588 KB Output is correct
2 Correct 8 ms 5588 KB Output is correct
3 Correct 7 ms 5588 KB Output is correct
4 Correct 7 ms 5588 KB Output is correct
5 Correct 82 ms 25452 KB Output is correct
6 Correct 76 ms 25376 KB Output is correct
7 Correct 56 ms 16644 KB Output is correct
8 Correct 54 ms 16688 KB Output is correct
9 Correct 9 ms 5584 KB Output is correct
10 Correct 7 ms 5588 KB Output is correct
11 Correct 6 ms 5712 KB Output is correct
12 Correct 71 ms 24316 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 852 KB Output is correct
4 Correct 2 ms 1220 KB Output is correct
5 Correct 4 ms 5332 KB Output is correct
6 Correct 4 ms 5204 KB Output is correct
7 Correct 6 ms 5844 KB Output is correct
8 Correct 3 ms 5204 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 4 ms 4820 KB Output is correct
12 Correct 4 ms 5204 KB Output is correct
13 Correct 8 ms 5588 KB Output is correct
14 Correct 8 ms 5588 KB Output is correct
15 Correct 7 ms 5588 KB Output is correct
16 Correct 7 ms 5588 KB Output is correct
17 Correct 82 ms 25452 KB Output is correct
18 Correct 76 ms 25376 KB Output is correct
19 Correct 56 ms 16644 KB Output is correct
20 Correct 54 ms 16688 KB Output is correct
21 Correct 9 ms 5584 KB Output is correct
22 Correct 7 ms 5588 KB Output is correct
23 Correct 6 ms 5712 KB Output is correct
24 Correct 71 ms 24316 KB Output is correct
25 Correct 8 ms 5580 KB Output is correct
26 Correct 7 ms 5580 KB Output is correct
27 Correct 7 ms 5588 KB Output is correct
28 Correct 7 ms 5600 KB Output is correct
29 Correct 95 ms 25280 KB Output is correct
30 Correct 87 ms 25136 KB Output is correct
31 Correct 45 ms 16708 KB Output is correct
32 Correct 47 ms 16396 KB Output is correct
33 Correct 7 ms 5652 KB Output is correct
34 Correct 8 ms 5588 KB Output is correct
35 Correct 7 ms 5972 KB Output is correct
36 Correct 98 ms 29740 KB Output is correct