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#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
using namespace std;
int main()
{
int n, k, arr[1000], brr[1000], index = 1;
cin >> n;
for (int i = 0;i < n;i++) {
cin >> arr[i];
}
cin >> k;
sort(arr, arr + n);
brr[0] = arr[0];
for (int i = 1;i < n;i++) {
if (arr[i - 1] != arr[i]) {
brr[index++] = arr[i];
}
}
cout << brr[k - 1];
return 0;
}
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