import java.util.*; import java.io.*; import java.math.*; import java.util.stream.Stream; public class Main{ static PrintWriter output; static Scanner sc; static void solve(){ int n = ni(); String s = ns(); String t = ns(); StringBuilder sb = new StringBuilder(); sb.append(s); String r = sb.reverse().toString(); int ans = 0; int same = 0; for(int i=0;i counter(long [] A) { HashMap count = new HashMap<>(); for(int i=0;i