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Submission #492804

# Submission time Handle Problem Language Result Execution time Memory
492804 2021-12-09T02:27:05 Z paulomiranda98 Klasika (COCI20_klasika) C++17
33 / 110
 1102 ms 524292 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define endl '\n'
 
using namespace std;
 
using ll = long long;
using pii = pair<int, int>;
const int INF = 0x3f3f3f3f;
const ll INFLL = 0x3f3f3f3f3f3f3f3fLL;
const int MOD = 1000000007;
const int dx[] = { 0, 0, -1, 1, 1, -1,  1, -1};
const int dy[] = {-1, 1,  0, 0, 1, -1, -1,  1};

struct Vertex {
  int next[2];
  Vertex() {
    next[0] = next[1] = -1;
  }
};
struct XorTrie{
  vector<Vertex> trie;
  XorTrie(){
    trie.emplace_back();
  }
  void add(int x) {
    int v = 0;
    for(int i=30; i>=0; i--){
      int c = (x>>i)&1;
      if (trie[v].next[c] == -1) {
        trie[v].next[c] = trie.size();
        trie.emplace_back();
      }
      v = trie[v].next[c];
    }
  }
  int max(int x) {
    int v = 0, ans = 0;
    for(int i=30; i>=0; i--){
      int c = (x>>i)&1;
      if(trie[v].next[!c] != -1){
        ans |= (1<<i);
        v = trie[v].next[!c];
      }else if(trie[v].next[c] != -1){
        v = trie[v].next[c];
      }else{
        return 0;
      }
    }
    return ans;
  }
};


class SegTreeIterative{
private:
  vector<XorTrie> st;
  int n;
public:
  SegTreeIterative(int sz){
    for (n = 1; n < sz; n <<= 1);
    st.resize(n << 1);
  }
  //0-indexed
  void add(int i, int x){
    st[i += n].add(x);
    for (i >>= 1; i; i >>= 1)
      st[i].add(x);
  }
  //0-indexed [l, r]
  int query(int l, int r, int x){
    int ans = 0;
    for (l += n, r += n + 1; l < r; l >>= 1, r >>= 1){
      if (l & 1)
        ans = max(ans, st[l++].max(x));
      if (r & 1)
        ans = max(st[--r].max(x), ans);
    }
    return ans;
  }
};

const int MAXN = 200010;

vector<int> adj[MAXN];
int in[MAXN], out[MAXN];
bool active[MAXN];
int v[MAXN], T;
/*
void build(int u){
  in[u] = T++;

  for(int to: adj[u]){
    v[to] ^= v[u];
    build(to);
  }

  out[u] = T-1;
}*/

void build(){
  stack<pii> st;
  st.emplace(1, -1);
  while(!st.empty()){
    auto [u, i] = st.top();
    st.pop();
    if(i == -1){
      in[u] = T++;
      st.emplace(u, 0);
    }else if(i < adj[u].size()){
      st.emplace(u, i+1);
      int to = adj[u][i];
      v[to] ^= v[u];
      st.emplace(adj[u][i], -1);
    }else{
      out[u] = T - 1;
    }
  }
}

int main() {
  ios_base::sync_with_stdio(false); cin.tie(NULL);
  int q;
  cin >> q;
  
  vector<tuple<string, int, int>> queries;
  
  int last = 1;
  
  for(int i=0; i<q; i++){
    string op;
    int a, b;
    cin >> op >> a >> b;
    if(op == "Add"){
      last++;
      adj[a].push_back(last);
      v[last] = b;
      queries.emplace_back(op, last, -1);
    }else{
      queries.emplace_back(op, a, b);
    }
  }
  
  build();
  SegTreeIterative st(q);
  st.add(in[1], v[1]);
    
  for(auto [op, a, b]: queries){
    if(op == "Add"){
      st.add(in[a], v[a]);
    }else{
      cout << st.query(in[b], out[b], v[a]) << endl;
    }
  }
  
  return 0;
}

Compilation message

klasika.cpp: In function 'void build()':
klasika.cpp:112:16: warning: comparison of integer expressions of different signedness: 'std::tuple_element<1, std::pair<int, int> >::type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  112 |     }else if(i < adj[u].size()){
      |              ~~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5196 KB Output is correct
2 Correct 3 ms 5196 KB Output is correct
3 Correct 3 ms 5324 KB Output is correct
4 Correct 3 ms 5324 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 3 ms 5196 KB Output is correct
7 Correct 3 ms 5324 KB Output is correct
8 Correct 3 ms 5324 KB Output is correct
9 Correct 3 ms 5092 KB Output is correct
10 Correct 3 ms 5196 KB Output is correct
11 Correct 4 ms 5324 KB Output is correct
12 Correct 3 ms 5324 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5196 KB Output is correct
2 Correct 3 ms 5196 KB Output is correct
3 Correct 3 ms 5324 KB Output is correct
4 Correct 3 ms 5324 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 3 ms 5196 KB Output is correct
7 Correct 3 ms 5324 KB Output is correct
8 Correct 3 ms 5324 KB Output is correct
9 Correct 3 ms 5092 KB Output is correct
10 Correct 3 ms 5196 KB Output is correct
11 Correct 4 ms 5324 KB Output is correct
12 Correct 3 ms 5324 KB Output is correct
13 Correct 7 ms 6604 KB Output is correct
14 Correct 9 ms 7616 KB Output is correct
15 Correct 10 ms 8800 KB Output is correct
16 Correct 12 ms 9996 KB Output is correct
17 Correct 6 ms 6476 KB Output is correct
18 Correct 8 ms 7628 KB Output is correct
19 Correct 10 ms 8692 KB Output is correct
20 Correct 14 ms 9660 KB Output is correct
21 Correct 6 ms 6476 KB Output is correct
22 Correct 9 ms 7628 KB Output is correct
23 Correct 10 ms 8656 KB Output is correct
24 Correct 11 ms 9668 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 489 ms 196908 KB Output is correct
2 Correct 796 ms 344504 KB Output is correct
3 Correct 1102 ms 491568 KB Output is correct
4 Runtime error 1084 ms 524292 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5196 KB Output is correct
2 Correct 3 ms 5196 KB Output is correct
3 Correct 3 ms 5324 KB Output is correct
4 Correct 3 ms 5324 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 3 ms 5196 KB Output is correct
7 Correct 3 ms 5324 KB Output is correct
8 Correct 3 ms 5324 KB Output is correct
9 Correct 3 ms 5092 KB Output is correct
10 Correct 3 ms 5196 KB Output is correct
11 Correct 4 ms 5324 KB Output is correct
12 Correct 3 ms 5324 KB Output is correct
13 Correct 7 ms 6604 KB Output is correct
14 Correct 9 ms 7616 KB Output is correct
15 Correct 10 ms 8800 KB Output is correct
16 Correct 12 ms 9996 KB Output is correct
17 Correct 6 ms 6476 KB Output is correct
18 Correct 8 ms 7628 KB Output is correct
19 Correct 10 ms 8692 KB Output is correct
20 Correct 14 ms 9660 KB Output is correct
21 Correct 6 ms 6476 KB Output is correct
22 Correct 9 ms 7628 KB Output is correct
23 Correct 10 ms 8656 KB Output is correct
24 Correct 11 ms 9668 KB Output is correct
25 Correct 489 ms 196908 KB Output is correct
26 Correct 796 ms 344504 KB Output is correct
27 Correct 1102 ms 491568 KB Output is correct
28 Runtime error 1084 ms 524292 KB Execution killed with signal 9
29 Halted 0 ms 0 KB -