oj.uz

Submission #938765

# Submission time Handle Problem Language Result Execution time Memory
938765 2024-03-05T14:03:17 Z User0069 Klasika (COCI20_klasika) C++17
0 / 110
 547 ms 524288 KB 
#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=1e6+1;
const int INF=1e9;
int n=1,q,a[maxn],b[maxn],in[maxn],out[maxn],cur,v[maxn];
string s[maxn];
vector<int> adj[maxn];
struct trie
{
    struct node
    {
        node* child[2]={NULL,NULL};
        int cnt=0;
    };
    node* root;
    trie()
    {
        root=new node;
    }
    void add(int x)
    {
        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->cnt++;
        }
    }
    int get(int x)
    {
        int ans=0;
        node* cur=root;
        for(int i=30;i>=0;i--)
        {
            int c=(x>>i)&1;
            if(cur->child[1^c]!=NULL)
            {
                ans+=(1<<i);
                cur=cur->child[1^c];
            }
            else if(cur->child[c]!=NULL) cur=cur->child[c];
            else return 0;
        }
        return ans;
    }
};
struct segtree
{
    trie ST[4*maxn];
    void update(int id,int cl,int cr,int pos,int val)
    {
        if(cl>pos||cr<pos) return;
        ST[id].add(val);
        if(cl==cr) return;
        int mid=(cl+cr)/2;
        if(pos<=mid) update(2*id,cl,mid,pos,val);
        else update(2*id+1,mid+1,cr,pos,val);
    }
    int get(int id,int cl,int cr,int l,int r,int val)
    {
        if(cl>r||cr<l) return 0;
        if(cl>=l&&cr<=r) return ST[id].get(val);
        int mid=(cl+cr)/2;
        return max(get(2*id,cl,mid,l,r,val),get(2*id+1,mid+1,cr,l,r,val));
    }
}f;
void dfs(int x,int par)
{
    in[x]=cur++;
    v[x]=v[par]^v[x];
    for(int y:adj[x])
    {
        dfs(y,x);
    }
    out[x]=cur;
}
signed main()
{
    if (fopen(taskname".INP","r"))
    {
        freopen(taskname".INP","r",stdin);
        freopen(taskname".OUT","w",stdout);
    }
    Faster
    cin>>q;
    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];
        }
    }
    dfs(1,0);
    int cc=1;
    f.update(1,1,n,1,0);
    for(int i=1;i<=q;i++)
    {
        if(s[i]=="Add")
        {
            ++cc;
            f.update(1,1,n,in[cc],v[cc]);
        }
        else
        {
            cout<<f.get(1,1,n,in[b[i]],out[b[i]],v[a[i]])<<"\n";
        }
    }
//    for(int i=1;i<=n;i++) cout<<v[i]<<" ";

}

Compilation message

klasika.cpp: In function 'int main()':
klasika.cpp:95:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |         freopen(taskname".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen(taskname".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 136 ms 218468 KB Output is correct
2 Incorrect 116 ms 218700 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 136 ms 218468 KB Output is correct
2 Incorrect 116 ms 218700 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Runtime error 547 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 136 ms 218468 KB Output is correct
2 Incorrect 116 ms 218700 KB Output isn't correct
3 Halted 0 ms 0 KB -