first commit

J04003 - PHÂN SỐ.java

@@ -0,0 +1,16 @@
+import java.util.Scanner;
+
+public class Main{
+    static long gcd(long a, long b){
+        if(b==0) return a;
+        return gcd(b,a%b);
+    }
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        long a = sc.nextLong(), b = sc.nextLong();
+        long g = gcd(a,b);
+        a/=g; b/=g;
+        System.out.printf("%d/%d",a,b);
+        sc.close();
+    }
+}