JAVA
java
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import java.util.Scanner;
import java.util.Arrays;
public class Program
{
public static void main(String[] args) {
Scanner sc= new Scanner(System.in);
String a=sc.nextLine();
String b=sc.nextLine();
String d=sc.nextLine();
d=d+" "+a;
int l;
int agents = Integer.parseInt(b);
String[] j=d.split(" ");
Arrays.sort(j);
int index = 1;
for (int i=0;i<j.length;i++) {
if (j[i].equals(a)) {
index = i+1;
break; } }
int ab = 0;
do {
index -= agents;
ab++; }
while (index>0);
System.out.println(ab*20);
}
}
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OUTPUT
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