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Submission #588542

# Submission time Handle Problem Language Result Execution time Memory
588542 2022-07-03T13:39:21 Z leeh18 Klasika (COCI20_klasika) C++17
110 / 110
 2789 ms 428992 KB 
#include <bits/stdc++.h>
using namespace std;

struct graph {
    int n, timer;
    vector<vector<pair<int, int>>> adj;
    vector<int> dist, tin, tout;
    graph(int n_) : n(n_), timer(0), adj(n), dist(n), tin(n), tout(n) {}
    void add_edge(int parent, int node, int weight) {
        adj[parent].push_back({node, weight});
    }
    void dfs(int u = 0) {
        tin[u] = timer++;
        for (auto [v, w] : adj[u]) {
            dist[v] = dist[u] ^ w;
            dfs(v);
        }
        tout[u] = timer++;
    }
};

struct trie_node {
    array<unique_ptr<trie_node>, 2> children;
    set<int> s;
    void insert(int x, int tin, int pos = 30) {
        if (pos < 0) return;
        int bit = (x >> pos) & 1;
        if (children[bit] == nullptr) {
            children[bit] = make_unique<trie_node>();
        }
        children[bit]->s.insert(tin);
        children[bit]->insert(x, tin, pos-1);
    }
    bool check(int bit, int tin, int tout) {
        if (children[bit] == nullptr) return false;
        const auto &cs = children[bit]->s;
        auto lower_it = cs.lower_bound(tin);
        auto upper_it = cs.upper_bound(tout);
        return lower_it != upper_it;
    }
    int max_xor(int x, int tin, int tout, int pos = 30) {
        if (pos < 0) return 0;
        int ret = 0;
        int bit = (x >> pos) & 1;
        if (check(bit^1, tin, tout)) {
            ret = children[bit^1]->max_xor(x, tin, tout, pos-1);
            ret |= (1 << pos);
        } else {
            ret = children[bit]->max_xor(x, tin, tout, pos-1);
        }
        return ret;
    }
};

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int Q;
    cin >> Q;
    vector<tuple<int, int, int>> qs(Q);
    int cnt = 1;
    for (auto &[t, a, b] : qs) {
        string s;
        cin >> s >> a >> b;
        if (s == "Add") {
            t = 1;
            ++cnt;
            --a;
        } else {
            t = 2;
            --a;
            --b;
        }
    }
    graph g(cnt);
    int id = 0;
    for (auto &[t, a, b] : qs) {
        if (t == 1) {
            ++id;
            g.add_edge(a, id, b);
            b = id;
        }
    }
    g.dfs();
    trie_node trie;
    trie.insert(0, g.tin[0]);
    for (auto [t, a, b] : qs) {
        if (t == 1) {
            trie.insert(g.dist[b], g.tin[b]);
        } else {
            auto ans = trie.max_xor(g.dist[a], g.tin[b], g.tout[b]);
            cout << ans << '\n';
        }
    }
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 520 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 852 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 700 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 2 ms 820 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 520 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 852 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 700 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 2 ms 820 KB Output is correct
13 Correct 3 ms 1748 KB Output is correct
14 Correct 6 ms 3028 KB Output is correct
15 Correct 9 ms 4304 KB Output is correct
16 Correct 11 ms 5460 KB Output is correct
17 Correct 6 ms 1652 KB Output is correct
18 Correct 6 ms 2900 KB Output is correct
19 Correct 12 ms 4088 KB Output is correct
20 Correct 15 ms 5300 KB Output is correct
21 Correct 6 ms 1620 KB Output is correct
22 Correct 8 ms 2900 KB Output is correct
23 Correct 8 ms 4172 KB Output is correct
24 Correct 10 ms 5280 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 855 ms 115604 KB Output is correct
2 Correct 1361 ms 221536 KB Output is correct
3 Correct 1791 ms 322772 KB Output is correct
4 Correct 2336 ms 424716 KB Output is correct
5 Correct 791 ms 114080 KB Output is correct
6 Correct 1300 ms 218220 KB Output is correct
7 Correct 1879 ms 318028 KB Output is correct
8 Correct 2408 ms 417832 KB Output is correct
9 Correct 770 ms 113644 KB Output is correct
10 Correct 1338 ms 219044 KB Output is correct
11 Correct 1947 ms 320180 KB Output is correct
12 Correct 2406 ms 419664 KB Output is correct

Subtask #4
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 520 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 852 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 700 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 2 ms 820 KB Output is correct
13 Correct 3 ms 1748 KB Output is correct
14 Correct 6 ms 3028 KB Output is correct
15 Correct 9 ms 4304 KB Output is correct
16 Correct 11 ms 5460 KB Output is correct
17 Correct 6 ms 1652 KB Output is correct
18 Correct 6 ms 2900 KB Output is correct
19 Correct 12 ms 4088 KB Output is correct
20 Correct 15 ms 5300 KB Output is correct
21 Correct 6 ms 1620 KB Output is correct
22 Correct 8 ms 2900 KB Output is correct
23 Correct 8 ms 4172 KB Output is correct
24 Correct 10 ms 5280 KB Output is correct
25 Correct 855 ms 115604 KB Output is correct
26 Correct 1361 ms 221536 KB Output is correct
27 Correct 1791 ms 322772 KB Output is correct
28 Correct 2336 ms 424716 KB Output is correct
29 Correct 791 ms 114080 KB Output is correct
30 Correct 1300 ms 218220 KB Output is correct
31 Correct 1879 ms 318028 KB Output is correct
32 Correct 2408 ms 417832 KB Output is correct
33 Correct 770 ms 113644 KB Output is correct
34 Correct 1338 ms 219044 KB Output is correct
35 Correct 1947 ms 320180 KB Output is correct
36 Correct 2406 ms 419664 KB Output is correct
37 Correct 1321 ms 119500 KB Output is correct
38 Correct 1914 ms 224604 KB Output is correct
39 Correct 2304 ms 328892 KB Output is correct
40 Correct 2789 ms 428992 KB Output is correct
41 Correct 1390 ms 117440 KB Output is correct
42 Correct 1919 ms 221276 KB Output is correct
43 Correct 2306 ms 321596 KB Output is correct
44 Correct 2554 ms 420804 KB Output is correct
45 Correct 1440 ms 116928 KB Output is correct
46 Correct 2112 ms 222352 KB Output is correct
47 Correct 2344 ms 322384 KB Output is correct
48 Correct 2618 ms 423428 KB Output is correct