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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int single_sorted(vector<int>arr){
  6.     int n=arr.size();
  7.     int low=0;
  8.     int high=n-1;
  9.     while(low<high){
  10.         int mid=(low+high)/2;
  11.         if(mid%2==1){
  12.             mid--;
  13.         }
  14.  
  15.         if(arr[mid]==arr[mid+1]){
  16.             low=mid+2;
  17.         }
  18.         else{
  19.             high=mid;
  20.         }
  21.     }
  22.  
  23.     return arr[low];
  24. }
  25.  
  26. int main(){
  27.     int n;
  28.     cin>>n;
  29.     vector<int>arr(n);
  30.     for(int i=0;i<n;i++){
  31.         cin>>arr[i];
  32.     }
  33.     int ans=single_sorted(arr);
  34.     cout<<"Single element in the given array: "<<ans<<endl;
  35.     return 0;
  36. }
Success #stdin #stdout 0.01s 5324KB
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stdout
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Single element in the given array: 2
https://ideone.com/cs3BPE
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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