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Q2501.java
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Q2501.java
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package olympiad;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.StringTokenizer;
public class Q2501 {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
StringTokenizer st = new StringTokenizer(br.readLine());
int N = Integer.parseInt(st.nextToken());
int K = Integer.parseInt(st.nextToken());
ArrayList<Integer> aliquot = new ArrayList<Integer>();
for (int i = 1; i <= N; i++) {
if(N % i == 0)
aliquot.add(i);
}
if(K - 1 < aliquot.size())
bw.write(aliquot.get(K - 1) + "\n");
else
bw.write(0 + "\n");
br.close();
bw.close();
}
}