#include <bits/stdc++.h>
using namespace std;
int Q, N = 1, cur[200005];
int ST[800005], par[200005][20], calc[200005][20];
int timer, tin[200005], out[200005];
bool rem[200005];
vector<pair<int, int>> adj[200005];
void update(int v, int l, int r, int p, int val) {
if(l == r) {
ST[v] = val;
return;
}
int md = (l + r) / 2;
if(p <= md) update(v * 2, l, md, p, val);
else update(v * 2 + 1, md + 1, r, p, val);
ST[v] = max(ST[v * 2], ST[v * 2 + 1]);
}
int solve(int v, int l, int r, int lo, int hi) {
if(l > hi || r < lo) return 0;
if(l >= lo && r <= hi) return ST[v];
return max(solve(v * 2, l, (l + r) / 2, lo, hi),
solve(v * 2 + 1, (l + r) / 2 + 1, r, lo, hi));
}
void dfs(int v, int p) {
tin[v] = timer++; par[v][0] = p;
for(auto u : adj[v]) {
if(u.first == p) continue;
cur[u.first] = (cur[v] ^ u.second);
calc[u.first][0] = u.second;
rem[u.first] = 1; dfs(u.first, v);
}
out[v] = timer - 1;
}
int dfs(int v, int p, int t) {
int best = (cur[v] ^ cur[t]);
for(auto u : adj[v]) {
if(u.first == p || rem[u.first]) continue;
best = max(best, dfs(u.first, v, t));
}
return best;
}
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin >> Q;
vector<array<int, 4>> query;
for(int l = 0; l < Q; l++) {
string S; int A, B;
cin >> S >> A >> B;
if(S == "Add") {
++N; adj[A].push_back({N, B});
adj[N].push_back({A, B});
query.push_back({1, A, N, B});
}
if(S == "Query")
query.push_back({2, A, B});
}
dfs(1, 1);
for(int l = 1; l < 20; l++)
for(int i = 1; i <= N; i++)
par[i][l] = par[par[i][l - 1]][l - 1],
calc[i][l] = (calc[i][l - 1] ^ calc[par[i][l - 1]][l - 1]);
map<int, int> M; M[0] = 1;
for(int l = 0; l < Q; l++) {
int t = query[l][0];
if(t == 1) {
int A = query[l][2];
int K = 0;
for(int i = 30; i >= 0; i--) {
if(cur[A] & (1 << i))
K += (1 << i);
M[K] = 1;
}
M[K] = 1; rem[A] = 0;
}
if(t == 2) {
int A = query[l][1], B = query[l][2];
if(B == 1) {
int res = 0;
for(int i = 30; i >= 0; i--) {
if(cur[A] & (1 << i)) {
if(M[res] != 1) res += (1 << i);
}
else {
res += (1 << i);
if(M[res] != 1) res -= (1 << i);
}
}
cout << (res ^ cur[A]) << "\n";
continue;
}
cout << dfs(B, par[B][0], A) << "\n";
}
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
5076 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
5076 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
728 ms |
46128 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
5076 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
