// Online Java Compiler
// Use this editor to write, compile and run your Java code online
class Main {
public static void main
(String[] args
) { System.
out.
println("Try programiz.pro");
int n=11;
if(n%2==0 || n<0){
System.
out.
println("Invalid input"); return;
}
for(int i=0;i<n;i++){
}
for(int i=0;i<n+2;i++){
for(int j=0;j<=n/2;j++){
if(j!=n/2){
}else{
}
}
}
// System.out.println();
for(int i=0;i<n-(n/2);i++){
for(int j=0;j<i;j++){
}
for(int j=0;j<n-(2*i);j++){
// j=j-n/2;
}
}
}
}
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