first commit

J01021 - TÍNH LŨY THỪA.java

@@ -0,0 +1,23 @@
+
+import java.util.Scanner;
+public class Main {
+
+    static long mod=1000000007;
+
+    static long mod(long a,long b){
+        if(b==0) return 1;
+        if(b%2==1) return mod(a,b-1)*a%mod;
+        long p=mod(a,b/2);
+        return p*p%mod;
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        while(true){
+            long a=sc.nextLong(), b=sc.nextLong();
+            if(a==0 && b==0) break;
+            System.out.println(mod(a,b));
+        }
+        sc.close();
+    }
+}