/*** Coding for Fun ^^ وَمَا تَوْفِيقِي إِلَّا بِاللَّهِ ۚ عَلَيْهِ تَوَكَّلْتُ وَإِلَيْهِ أُنِيبُ ***/
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
#include <ext/numeric>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ull unsigned ll
#define ld long double
#define ed '\n'
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fixed(x) fixed<<setprecision(x)
#define memo(dp,x) memset(dp,x,sizeof(dp))
#define sumOf(a) (ll)((-1 + sqrt(8LL * a + 1)) / 2)
#define debug cerr
#define Good_Bay return
using namespace std;
using namespace __gnu_pbds;
std::mt19937_64 rng(std::chrono::system_clock::now().time_since_epoch().count());
template < typename T > using ordered_set = tree< T, null_type, less_equal< T >, rb_tree_tag, tree_order_statistics_node_update >;
template < typename T > istream& operator >> (istream& in, vector < T >& v) {
for (auto& x : v) in >> x;
return in;
}
template < typename T > ostream& operator << (ostream& out, const vector < T >& v) {
for (const T& x : v) out << x << ' ';
return out;
}
void Accept() { // for VS code
ios_base::sync_with_stdio(false);
cout.tie(nullptr);
cin.tie(nullptr);
// #ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
// #else
// freopen("darwin.in", "r", stdin);
// freopen("visitfj.out", "w", stdout);
// #endif
}
constexpr int mod = 1e9 + 7, oo = 0x3f3f3f3f, N = 2e5 + 5;
const double pi = acos(-1), EPS = 1e-7;
constexpr ll OO = 0x3f3f3f3f3f3f3f3f;
constexpr int dy[] = { 0 , 1 , -1 , 0 , 1 , -1 , 1 , -1 };
constexpr int dx[] = { 1 , 0 , 0 , -1 , 1 , -1 , -1 , 1 };
struct query {
int t, a, b;
};
vector<int>adj[N];
vector<int>in(N), out(N);
vector<query>Q;
int n = 1, id = 1;
void dfs(int u) {
in[u] = id++;
for (auto& v : adj[u]) dfs(v);
out[u] = id++;
}
struct binary_trie {
vector<array<int, 2>> trie;
vector<array<set<int>, 2>> numsIn;
int LOG;
binary_trie(int _LOG) : LOG(_LOG) {
trie = { array<int, 2>{-1, -1} };
numsIn = { array<set<int>, 2>{} };
}
void insert(int x, int u) {
int v = 0;
for (int bit = LOG - 1; bit >= 0; --bit) {
int to = ((1LL << bit) & x ? 1 : 0);
if (~trie[v][to]) {
numsIn[v][to].insert(in[u]);
v = trie[v][to];
}
else {
numsIn[v][to].insert(in[u]);
v = (trie[v][to] = (int)trie.size());
trie.push_back(array<int, 2>{-1, -1});
numsIn.push_back(array<set<int>, 2>{});
}
}
}
ll query_max(ll x, int u) {
ll v = 0, sum = 0;
for (int bit = LOG - 1; bit >= 0; bit--) {
ll to = ((1LL << bit) & x ? 0 : 1);
if (~trie[v][to]) {
auto itIn = numsIn[v][to].lower_bound(in[u]);
if (itIn != numsIn[v][to].end() and *itIn <= out[u]) {
v = trie[v][to], sum += to * (1LL << bit);
}
else v = trie[v][1 - to], sum += (1 - to) * (1LL << bit);
}
else {
v = trie[v][1 - to], sum += (1 - to) * (1LL << bit);
}
}
return x ^ sum;
}
};
void doWork(int T) {
int q;
cin >> q;
binary_trie tr(32);
vector<int>preXor(N);
for (int i = 0;i < q;i++) {
string s;
int a, b;
cin >> s >> a >> b;
if (s == "Add") {
adj[a].push_back(++n);
preXor[n] = preXor[a] ^ b;
Q.push_back({ 1,a,b });
}
else {
Q.push_back({ 2,a,b });
}
}
dfs(1);
n = 1;
tr.insert(0, 1);
for (auto i : Q) {
if (i.t == 2) cout << tr.query_max(preXor[i.a], i.b) << ed;
else {
tr.insert(preXor[++n], n);
}
}
}
int main() {
// debug << "M3L4 El-Code MYTFHM4";
Accept();
int _ = 1;
// cin >> _;
for (int __ = 1;__ <= _;__++) {
// cout << "Case " << __ << ": ";
doWork(__);
if (__ < _)cout << '\n';
// cout << '\n';
}
Good_Bay 0;
}
Compilation message
klasika.cpp: In function 'void doWork(int)':
klasika.cpp:142:30: warning: operation on 'n' may be undefined [-Wsequence-point]
142 | tr.insert(preXor[++n], n);
| ^~~
klasika.cpp:142:30: warning: operation on 'n' may be undefined [-Wsequence-point]
klasika.cpp: In function 'void Accept()':
klasika.cpp:42:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
42 | freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
43 | freopen("output.txt", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
930 ms |
107740 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
930 ms |
107740 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
887 ms |
107676 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
930 ms |
107740 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
