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제출 #1119073

#제출 시각아이디문제언어결과실행 시간메모리
1119073ttamxKlasika (COCI20_klasika)C++17
110 / 110
786 ms343804 KiB
#include<bits/stdc++.h> using namespace std; const int N=2e5+5; int n,q,m; vector<tuple<int,int,int>> qr[N]; int val[N]; vector<int> adj[N]; int timer=0; int ans[N]; struct Trie{ struct Node{ int t; array<int,2> ch; Node():t(N),ch{-1,-1}{} }; vector<Node> node; vector<pair<int,int>> dat; Trie():dat(){new_node();} int new_node(){ node.emplace_back(Node()); return node.size()-1; } int get_t(int u){ return ~u?node[u].t:N; } void update(int x,int t){ dat.emplace_back(x,t); int u=0; node[u].t=min(node[u].t,t); for(int i=29;i>=0;i--){ int c=x>>i&1; if(node[u].ch[c]==-1)node[u].ch[c]=new_node(); u=node[u].ch[c]; node[u].t=min(node[u].t,t); } } int query(int x,int t){ int res=0; int u=0; for(int i=29;i>=0;i--){ int c=x>>i&1; if(get_t(node[u].ch[c^1])<=t){ u=node[u].ch[c^1]; res|=1<<i; }else{ u=node[u].ch[c]; } } return res; } int size(){ return dat.size(); } void clear(){ node.clear(); } }dp[N]; void dfs(int u){ dp[u].update(val[u],u); for(auto v:adj[u]){ dfs(v); if(dp[v].size()>dp[u].size())swap(dp[u],dp[v]); for(auto [x,t]:dp[v].dat){ dp[u].update(x,t); } dp[v].clear(); } for(auto [x,t,i]:qr[u]){ ans[i]=dp[u].query(x,t); } } int main(){ cin.tie(nullptr)->sync_with_stdio(false); cin >> q; n=1; for(int i=1;i<=q;i++){ string op; int x,y; cin >> op >> x >> y; if(op=="Add"){ val[++n]=val[x]^y; adj[x].emplace_back(n); }else{ qr[y].emplace_back(val[x],n,++m); } } dfs(1); for(int i=1;i<=m;i++){ cout << ans[i] << "\n"; } }
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