Submission #1137843

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1137843	2025-01-21 00:21:20	nikolashami	Norela (info1cup18_norela)	C++20	100 / 100	86 ms	328 KiB

norela

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#include<iostream>
using namespace std;
using ll=long long;
ll c[26],x,pc2;
int ans,nw,msk,cans;
int n,m;
void r(int i){
  if(i>=m){
    if(!x){
        int pc1=cans;
        if(pc1<pc2)return;
        if(pc1>pc2){ans=nw;cans=pc2;}
        else ans=max(ans,nw);
      }
      return;
  }
  r(i+1);
  x^=c[i];
  msk^=(1<<i);
  nw^=(1<<(m-i-1));
  ++pc2;
  r(i+1);
  msk^=(1<<i);
  nw^=(1<<(m-i-1));
  x^=c[i];
  --pc2;
}
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 25 / 25
• Subtask 4: 25 / 25