Submission #1119875

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119875		steveonalex	Klasika (COCI20_klasika)	C++17	110 / 110	2113 ms	271132 KiB

klasika

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}

ll gcd(ll a, ll b){return __gcd(a, b);}
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return __lg(mask);}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n"){
        for(auto item: container) cout << item << separator;
        cout << finish;
    }


template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }


struct Trie{
    struct Node{
        int child[2];
        Node(){memset(child, -1, sizeof child);}
    };

    int n;
    vector<Node> a;

    Trie(){
        a.push_back(Node());
    }

    void add_child(int &x){
        x = a.size();
        a.push_back(Node());
    }

    void add(int x){
        int id = 0;
        for(int bit = 29; bit >= 0; --bit){
            int digit = GETBIT(x, bit);
            if (a[id].child[digit] == -1) add_child(a[id].child[digit]);
            id = a[id].child[digit];
        }
    }

    int get_max_xor(int x){
        if (a[0].child[0] == -1 && a[0].child[1] == -1) return 0;
        int id = 0, ans = 0;
        for(int bit = 29; bit >= 0; --bit){
            int digit = GETBIT(x, bit);
            if (a[id].child[1 - digit] != -1){
                id = a[id].child[1 - digit];
                ans += MASK(bit);
            }
            else id = a[id].child[digit];
        }
        return ans;
    }
};

struct Trie2D{
    struct Node{
        int child[8];
        Trie tri;
        Node(){memset(child, -1, sizeof child);}
    };

    int n;
    vector<Node> a;

    Trie2D(){
        a.push_back(Node());
    }

    void add_child(int &x){
        x = a.size();
        a.push_back(Node());
    }

    void add(int x, int y){
        int id = 0;
        for(int bit = 5; bit >= 0; --bit){
            a[id].tri.add(y);
            int digit = GETBIT(x, bit * 3 + 2) * 4 + GETBIT(x, bit * 3 + 1) * 2 + GETBIT(x, bit * 3);
            if (a[id].child[digit] == -1) add_child(a[id].child[digit]);
            id = a[id].child[digit];
        }
        a[id].tri.add(y);
    }

    int query(int l, int r, int x, int layer, int id){
        if (l == 0 && r == MASK(layer + 3) - 1){
            return a[id].tri.get_max_xor(x);
        }    
        int ans = 0;
        for(int i = 0; i < 8; ++i) if (a[id].child[i] != -1){
            int _l = l - MASK(layer) * i, _r = r - MASK(layer) * i;
            maximize(_l, 0); minimize(_r, MASK(layer) - 1);
            if (_l > _r) continue;
            maximize(ans, query(_l, _r, x, layer - 3, a[id].child[i]));
        }
        return ans;
    }

    int query(int l, int r, int x){
        return query(l, r, x, 15, 0);
    }
};

const int N = 2e5 + 69;
int n;
vector<pair<int, int>> graph[N];
int h[N], in[N], out[N], dfs_cnt = 0;

void dfs(int u, int p){
    in[u] = out[u] = ++dfs_cnt;
    for(pair<int, int> v: graph[u]) if (v.first != p){
        h[v.first] = h[u] ^ v.second;
        dfs(v.first, u);
        out[u] = out[v.first];
    }
}

void solve(){
    int q; cin >> q;
    vector<array<int, 3>> query(q);
    n = 1;
    for(int i = 0; i<q; ++i){
        string type; int u, v; cin >> type >> u >> v;
        if (type == "Add") {
            n++;
            query[i] = {{1, n, v}};
            graph[u].push_back({n, v});
            graph[n].push_back({u, v});
        }
        else query[i] = {{2, u, v}};
    }

    dfs(1, 0);

    Trie2D tri;
    tri.add(1, 0);

    for(auto i: query){
        if (i[0] == 1){
            int x = h[i[1]], u = in[i[1]];

            tri.add(u, x);

        }
        else{
            int x = i[1], y = i[2];
            x = h[x];
            int l = in[y], r = out[y];
            int ans = tri.query(l, r, x);

            cout << ans << "\n";
        }
    }
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    clock_t start = clock();
    
    solve();

    cerr << "Time elapsed: " << clock() - start << "ms!\n";
    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 22 / 22
• Subtask 3: 33 / 33
• Subtask 4: 44 / 44