first commit

J03015 - HIỆU SỐ NGUYÊN LỚN - 2.java

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+import java.math.BigInteger;
+import java.util.Scanner;
+
+public class Main {
+    static BigInteger gcd(BigInteger a, BigInteger b){
+        if(b.equals(BigInteger.ZERO)) return a;
+        return gcd(b,a.mod(b));
+    }
+    public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        BigInteger a=sc.nextBigInteger(),b=sc.nextBigInteger();
+        System.out.println(a.subtract(b));
+    }
+}