first commit

J03026 - XÂU KHÁC NHAU DÀI NHẤT.java

@@ -0,0 +1,22 @@
+import java.util.Scanner;
+
+public class Main{
+    static boolean eq(String a, String b){
+        if(a.length() != b.length()) return false;
+        for(int i=0; i<a.length(); i++){
+            if(a.charAt(i) != b.charAt(i)) return false;
+        }
+        return true;
+    }
+    public static void main(String[] arg){
+        Scanner sc = new Scanner(System.in);
+        int t = sc.nextInt();
+        while(t-->0){
+            String a = sc.next();
+            String b = sc.next();
+            if(!eq(a,b)) System.out.println(Math.max(a.length(), b.length()));
+            else System.out.println("-1");
+        }
+        sc.close();
+    }
+}