Submission #940898

#	Time	Username	Problem	Language	Result	Execution time	Memory
940898		User0069	Klasika (COCI20_klasika)	C++17	33 / 110	5048 ms	47844 KiB

klasika

#include<bits/stdc++.h>
#define taskname ""
#define el '\n'
#define fi first
#define sc second
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
//#define int ll
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
#define Faster ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
const int maxn=2e5+6;
const int INF=1e9;
vector<int> adj[maxn];
int q,n,in[maxn],out[maxn],a[maxn],b[maxn],v[maxn],cur;
string s[maxn];
struct node
{
    node* child[2];
    int Max,Min;
    set<int> s;
    node()
    {
        child[1]=child[0]=NULL;
    }
};
node* root=new node();
void add(int x,int val)
{
    node* cur=root;
    for(int i=30;i>=0;i--)
    {
        int c=(x>>i)&1;
        if(cur->child[c]==NULL) cur->child[c]=new node();
        cur=cur->child[c];
        cur->s.insert(val);
    }
}
int get(int val,int l,int r)
{
    node* cur =root;
    int ans=0;
    for(int i=30;i>=0;i--)
    {
        int c=(val>>i)&1;
        node* kk=cur->child[1^c];
        if(kk!=NULL)
        {
            auto k=lower_bound(kk->s.begin(),kk->s.end(),l);
            if(k!=kk->s.end()&&*k<=r)
            {
                ans+=(1<<i);
                cur=cur->child[1^c];
            }
            else cur=cur->child[c];
        }
        else cur=cur->child[c];
    }
    return ans;
}
void dfs(int x)
{
    in[x]=++cur;
    for(int y:adj[x])
    {
        dfs(y);
    }
    out[x]=cur;
}
signed main()
{
    if (fopen(taskname".INP","r"))
    {
        freopen(taskname".INP","r",stdin);
        freopen(taskname".OUT","w",stdout);
    }
    Faster
    cin>>q;
    n=1;
    for(int i=1;i<=q;i++)
    {
        cin>>s[i]>>a[i]>>b[i];
        if(s[i]=="Add")
        {
            adj[a[i]].push_back(++n);
            v[n]=b[i]^v[a[i]];
        }
    }
    dfs(1);
    cur=1;
    add(v[1],in[1]);
    for(int i=1;i<=q;i++)
    {
        if(s[i]=="Add")
        {
            ++cur;
            add(v[cur],in[cur]);
        }
        else
        {
            cout<<get(v[a[i]],in[b[i]],out[b[i]])<<"\n";
        }
    }
}

Compilation message (stderr)

klasika.cpp: In function 'int main()':
klasika.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen(taskname".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         freopen(taskname".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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