20 lines
285 B
C++
20 lines
285 B
C++
|
#include<bits/stdc++.h>
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
int unique(int a[],int n){
|
||
|
|
int num=0;
|
||
|
|
for(int i=0;i<n;i++){
|
||
|
|
num=a[i]^num;
|
||
|
|
}
|
||
|
|
return num;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(){
|
||
|
|
int n;
|
||
|
|
cin>>n;
|
||
|
|
int a[n];
|
||
|
|
for(int i=0;i<n;i++){
|
||
|
|
cin>>a[i];
|
||
|
|
}
|
||
|
|
cout<<unique(a,n);
|
||
|
|
}
|