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Copy pathCOPYPUSH.java
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49 lines (45 loc) · 1006 Bytes
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package codechef_lib;
import java.util.Scanner;
public class COPYPUSH {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc = new Scanner(System.in);
int t = sc.nextInt();
for (int i=1;i<=t;i++) {
int n = sc.nextInt();
String a = sc.next();
String a_1="";
String a_2="";
boolean n_f=false;
while(!a.equals("")) {
if(a.length()%2==0){
a_1=a.substring(0, a.length()/2);
a_2=a.substring(a.length()/2);
if(a_1.equals(a_2)) {
a=a_1;
//System.out.println(a);
}else {
System.out.println("NO");
n_f=true;
break;
}
}else {
a_1=a.substring(0, a.length()/2);
a_2=a.substring(a.length()/2,a.length()-1);
if(a_1.equals(a_2)) {
a=a_1;
//System.out.println(a);
}else {
System.out.println("NO");
n_f=true;
break;
}
}
}
if(!n_f) {
System.out.println("YES");
}
}
}
}
//AC