Submission #832977

#	Time	Username	Problem	Language	Result	Execution time	Memory
832977		damwuan	Klasika (COCI20_klasika)	C++17	0 / 110	147 ms	84092 KiB

klasika

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define bit(n,i) ((n>>i)&1)
#define all(x) x.begin(),x.end()
//#pragma GCC optimize("O2,unroll-loops")
//#pragma GCC target("avx,avx2,bmi,bmi2,sse,sse2,sse3,ssse3,sse4,popcnt")
//#define int long long
typedef long long ll;
typedef pair<int,int> pii;
typedef double ld;
typedef pair<ld,ld> pdd;
typedef pair<ll,ll> pll;
const ll maxn=2e5+5;
const ll offset=1e9;
const ll block_sz=317;
const ll inf=1e18;
const ll mod=1e9+7;
int n;
struct TrieNode
{
    TrieNode* child[2];
    int cnt;
    TrieNode()
    {
        child[0]=child[1]=nullptr;
        cnt=inf;
    }
};
TrieNode* root[maxn];
void Update(TrieNode* r, int u,int Time)
{
    TrieNode* cur=r;
    for2(i,29,0)
    {
        bool nxt=(u>>i)&1;
        if (cur->child[nxt]==nullptr)
        {
            cur->child[nxt]=new TrieNode;
        }
        cur=cur->child[nxt];
        cur->cnt=min(cur->cnt,Time);
    }
}
int Get(TrieNode* r, int u,int Time)
{
    int ans=0;
    TrieNode* cur=r;
    for2(i,29,0)
    {
        bool nxt=((u>>i)&1)^1;
        //cerr<< nxt<<'\n';
        if (cur->child[nxt]!=nullptr && cur->child[nxt]->cnt<=Time)
        {
            cur=cur->child[nxt];
            ans+=(1<<i);
        }
        else
        //if (cur->child[nxt|1]!=nullptr)
        cur=cur->child[nxt^1];
        //else cout << "wtf\n";
    }
    return ans;
}

int q,id[maxn];
string type;
int pre[maxn],ans[maxn];
vector<int> adj[maxn],L[maxn];
vector<pii> qr[maxn];
void dfs(int u)
{
//    cerr<< u<<' '<<pre[u]<<'\n';
    L[u].pb(u);
    Update(root[u],pre[u],id[u]);
    for(int v: adj[u])
    {
//        cerr<< v<<" asd\n";
        dfs(v);
    }
    for(int v: adj[u])
    {
        if (L[v].size()>L[u].size())
        {
            L[u].swap(L[v]);
            swap(root[u],root[v]);
        }
        for(int a:L[v])
        {
            L[u].pb(a);
            Update(root[u],pre[a],id[a]);
        }
    }
    //cerr<< u<< ' '<<L[u].size()<<" wtf\n";
    //...
    for(auto x: qr[u])
    {
        //cerr<< u<<' '<<x.se<<' '<<x.fi<<' '<<L[u].size()<<'\n';
        ans[x.se]=Get(root[u],x.fi,x.se);
    }
}
void sol()
{
    cin >> q;
    n=1;
    for1(i,1,q)
    {
        ans[i]=-1;
        int a,b;cin>> type>>a>>b;
        if (type[0]=='A')
        {
            adj[a].pb(++n);
            pre[n]=pre[a]^b;
            id[n]=i;
        }
        else
        {
            qr[b].pb({pre[a],i});
        }
    }
    for1(i,1,n) root[i]=new TrieNode;
//    cerr<< "kk\n";
    dfs(1);
    for1(i,1,q) if (ans[i]!=-1) cout << ans[i]<<'\n';
}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
//    freopen("GROUPDIV.inp","r",stdin);
//    freopen("GROUPDIV.out","w",stdout);

    int t=1;//cin >> t;
    while (t--)
    {
        sol();
    }
}

Compilation message (stderr)

klasika.cpp: In constructor 'TrieNode::TrieNode()':
klasika.cpp:36:13: warning: overflow in conversion from 'll' {aka 'long long int'} to 'int' changes value from '1000000000000000000' to '-1486618624' [-Woverflow]
   36 |         cnt=inf;
      |             ^~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 22
• Subtask 3: 0 / 33
• Subtask 4: 0 / 44