Could you please help me in debugging the code, as this is not passing all the test cases (although according to dry run it is running fine) import java.util.*; public class Main { public static void main (String args[]) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); String s[] = new String[n]; String strin = new String(); for(int i = 0;i<n;i++){ s[i] = sc.next(); strin = strin + s[i]; } String c[] = strin.split(""); HashSet set = new HashSet<>(); n = c.length; for(int i = 0;i<n;i++){ if(!set.contains(c[i])){ set.add(c[i]); } } System.out.print(set.size()); } }
