first commit

J01001 - HÌNH CHỮ NHẬT.java

@@ -0,0 +1,16 @@
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner reader = new Scanner(System.in);
+        int a = reader.nextInt(), b = reader.nextInt();
+        if(a<=0 || b<=0){
+            reader.close();
+            System.out.print(0);
+            return;
+        }
+        String ans = String.format("%d %d",2*(a+b),a*b);
+        System.out.print(ans);
+        reader.close();
+    }
+}