Submission #914991

#	Time	Username	Problem	Language	Result	Execution time	Memory
914991		shenfe1	Xoractive (IZhO19_xoractive)	C++17	Compilation error	0 ms	0 KiB

Xoractive

#include <bits/stdc++.h>
#include "interactive.h"
 
 
#pragma GCC optimize("03")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
using namespace std;
 
#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define y1 yy
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define gcd(a,b) __gcd(a,b)
#define in insert
 
const int MAX=3e5+15;
const int B=2e5;
const int N=104;
const int block=450;
const int maxB=MAX/B+10;
const ll inf=1e18;  
const int mod=1e9+7;
const int mod1=1e9+9;
const ld eps=1e-9;
 
int dx[8]={1,0,-1,0,1,-1,-1,1};
int dy[8]={0,1,0,-1,1,-1,1,-1};
 
int a[MAX],b[MAX];
map<int,int> mp;

// int ask(int pos){
//   return b[pos];
// }

// vector<int> get_pairwise_xor(vector<int> f){
//   vector<int> res;
//   for(int x:f){
//     for(int y:f){
//       res.pb(b[x]^b[y]);
//     }
//   }
//   sort(all(res));
//   return res;
// }

vector<int> guess(int n){
  vector<int> ans;
  a[1]=ask(1);
  for(int i=0;i<7;i++){
    vector<int> ask,ask1;
    for(int j=2;j<=n;j++){
      if((j>>i)&1){
        ask.pb(j);
        ask1.pb(j);
      }
    }
    ask1.pb(1);
    sort(all(ask1));
    vector<int> v=get_pairwise_xor(ask);
    vector<int> v1=get_pairwise_xor(ask1);
    // for(int pos:ask)cout<<pos<<" ";
    // cout<<"\n";
    // for(int pos:ask1)cout<<pos<<" ";
    // cout<<"\n";
    multiset<int> st;
    for(int x:v1)st.in(x);
    for(int x:v){
      st.erase(st.find(x));
    }
    st.erase(st.find(x));
    set<int> st1;
    for(int x:st)st1.in(x);
    for(int x:st1){
      mp[(x^a[1])]+=(1<<i);
    }
  }
  for(pii x:mp){
    a[x.S]=x.F;
  }
  for(int i=1;i<=n;i++)ans.pb(a[i]);
  return ans;
}

// int main(){
//   int n;
//   cin>>n;
//   for(int i=1;i<=n;i++)cin>>b[i];
//   vector<int> f=guess(n);
//   for(int x:f)cout<<x<<" ";
// }

Compilation message (stderr)

Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:82:22: error: 'x' was not declared in this scope
   82 |     st.erase(st.find(x));
      |                      ^