/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
public static void print(int n){
if(n<3 || n%2==0){
System.
out.
println("enter a valid value"); return;
}
for(int i=0;i<n;i++){
for(int j=0;j<n/2;j++){
}
for(int k=0;k<2;k++){
}
}
for(int i=0;i<n+1;i++){
}
}
{
Scanner sc
=new Scanner
(System.
in); int n=sc.nextInt();
print(n);
}
}
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