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Submission #891752

# Submission time Handle Problem Language Result Execution time Memory
891752 2023-12-24T01:57:04 Z Fucsdeptrai Klasika (COCI20_klasika) C++17
33 / 110
 537 ms 524288 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 2e5 + 9;
const int Log = 30;

struct Node
{
    Node *c[2];
    int mn;

    Node()
    {
        c[0] = c[1] = NULL;
        mn = N;
    }
};

int n, q, Timer;
vector<pair<int, int>> adj[N];
int num[N], tail[N], pos[N], d[N];
vector<pair<pair<int, int>, int>> vt;
vector<pair<int, int>> vec[N*4];
Node *Trie[N*4];

void Add(int id, int x, int y)
{
    Node *p = Trie[id];
    for(int i = Log; i >= 0;i --)
    {
        bool w = (1<<i)&x;
        if(p->c[w] == NULL) p->c[w] = new Node;
        p = p->c[w];
        p->mn = min(p->mn, y);
    }
}

int Get(int id, int x, int y)
{
    Node *p = Trie[id];
    for(int i = Log; i >= 0;i --)
    {
        bool w = (1<<i)&x;
        if(p->c[w^1] != NULL and p->c[w^1]->mn <= y)
        {
            x ^= ((w^1)<<i);
            p = p->c[w^1];
        }
        else if(p->c[w] != NULL and p->c[w]->mn <= y)
        {
            x ^= (w<<i);
            p = p->c[w];
        }
        else
        {
            return 0;
        }
    }
    return x;
}

void Dfs(int u = 1, int du = 0)
{
    num[u] = ++ Timer;
    d[u] = du;
    pos[Timer] = u;
    for(auto [v, w] : adj[u])
    {
        Dfs(v, du^w);
    }
    tail[u] = Timer;
}

void Build(int id = 1, int l = 1, int r = n)
{
    if(l==r)
    {
        Trie[id] = new Node();
        Add(id, d[pos[l]], pos[l]);
        vec[id].push_back({d[pos[l]], pos[l]});
        return ;
    }

    int mid = l+r>>1;
    Build(id<<1, l, mid);
    Build(id<<1|1, mid+1, r);
    vec[id] = vec[id<<1];
    for(auto x : vec[id<<1|1]) vec[id].push_back(x);
    Trie[id] = new Node();
    int lst = -1;
    for(auto [x, y] : vec[id])
    {
        if(x==lst) continue;
        Add(id, x, y);
        lst = x;
    }
}

int Get(int L, int R, int x, int y, int id = 1, int l = 1, int r = n)
{
    if(l>r or l>R or L>r) return 0;
    if(L<=l and r<=R) return Get(id, x, y);

    int mid = l+r>>1;
    return max(Get(L, R, x, y, id<<1, l, mid), Get(L, R, x, y, id<<1|1, mid+1, r));
}

void Solve()
{
    cin>>q;
    ++n;
    while(q--)
    {
        string Type; cin>>Type;
        int x, y; cin >> x >> y;
        if(Type == "Add")
        {
            adj[x].push_back({++n, y});
        }
        else
        {
            vt.push_back({{x, y}, n});
        }
    }

    Timer = 0;
    Dfs();
    Build();

    for(auto [uv, w] : vt)
    {
        auto [u, v] = uv;
        cout << Get(num[v], tail[v], d[u], w) << '\n';
    }
}

signed main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int TC = 1;
//	cin>>TC;
    while(TC--)
    {
        Solve();
    }
}

Compilation message

klasika.cpp: In function 'void Build(int, int, int)':
klasika.cpp:86:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   86 |     int mid = l+r>>1;
      |               ~^~
klasika.cpp: In function 'int Get(int, int, int, int, int, int, int)':
klasika.cpp:106:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  106 |     int mid = l+r>>1;
      |               ~^~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 29276 KB Output is correct
2 Correct 7 ms 29572 KB Output is correct
3 Correct 7 ms 29788 KB Output is correct
4 Correct 9 ms 30044 KB Output is correct
5 Correct 6 ms 29272 KB Output is correct
6 Correct 6 ms 29500 KB Output is correct
7 Correct 7 ms 29784 KB Output is correct
8 Correct 7 ms 30040 KB Output is correct
9 Correct 7 ms 29276 KB Output is correct
10 Correct 7 ms 29532 KB Output is correct
11 Correct 7 ms 29788 KB Output is correct
12 Correct 7 ms 30044 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 29276 KB Output is correct
2 Correct 7 ms 29572 KB Output is correct
3 Correct 7 ms 29788 KB Output is correct
4 Correct 9 ms 30044 KB Output is correct
5 Correct 6 ms 29272 KB Output is correct
6 Correct 6 ms 29500 KB Output is correct
7 Correct 7 ms 29784 KB Output is correct
8 Correct 7 ms 30040 KB Output is correct
9 Correct 7 ms 29276 KB Output is correct
10 Correct 7 ms 29532 KB Output is correct
11 Correct 7 ms 29788 KB Output is correct
12 Correct 7 ms 30044 KB Output is correct
13 Correct 11 ms 32440 KB Output is correct
14 Correct 15 ms 36596 KB Output is correct
15 Correct 18 ms 40800 KB Output is correct
16 Correct 21 ms 44636 KB Output is correct
17 Correct 11 ms 32348 KB Output is correct
18 Correct 15 ms 36596 KB Output is correct
19 Correct 17 ms 40540 KB Output is correct
20 Correct 20 ms 44368 KB Output is correct
21 Correct 11 ms 32344 KB Output is correct
22 Correct 14 ms 36444 KB Output is correct
23 Correct 18 ms 40540 KB Output is correct
24 Correct 21 ms 44380 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Runtime error 537 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 29276 KB Output is correct
2 Correct 7 ms 29572 KB Output is correct
3 Correct 7 ms 29788 KB Output is correct
4 Correct 9 ms 30044 KB Output is correct
5 Correct 6 ms 29272 KB Output is correct
6 Correct 6 ms 29500 KB Output is correct
7 Correct 7 ms 29784 KB Output is correct
8 Correct 7 ms 30040 KB Output is correct
9 Correct 7 ms 29276 KB Output is correct
10 Correct 7 ms 29532 KB Output is correct
11 Correct 7 ms 29788 KB Output is correct
12 Correct 7 ms 30044 KB Output is correct
13 Correct 11 ms 32440 KB Output is correct
14 Correct 15 ms 36596 KB Output is correct
15 Correct 18 ms 40800 KB Output is correct
16 Correct 21 ms 44636 KB Output is correct
17 Correct 11 ms 32348 KB Output is correct
18 Correct 15 ms 36596 KB Output is correct
19 Correct 17 ms 40540 KB Output is correct
20 Correct 20 ms 44368 KB Output is correct
21 Correct 11 ms 32344 KB Output is correct
22 Correct 14 ms 36444 KB Output is correct
23 Correct 18 ms 40540 KB Output is correct
24 Correct 21 ms 44380 KB Output is correct
25 Runtime error 537 ms 524288 KB Execution killed with signal 9
26 Halted 0 ms 0 KB -