algorithm for magic no.

Miscellaneous/MagicNumber.java

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+// Java program to find nth 
+// magic numebr 
+import java.io.*; 
+
+class MagicNumber 
+{ 
+// Function to find nth magic number 
+static int nthMagicNo(int n) 
+{ 
+	int pow = 1, answer = 0; 
+
+	// Go through every bit of n 
+	while (n != 0) 
+	{ 
+	pow = pow*5; 
+
+	// If last bit of n is set 
+	if ((int)(n & 1) == 1) 
+		answer += pow; 
+
+	// proceed to next bit 
+	// or n = n/2 
+	n >>= 1; 
+	} 
+	return answer; 
+} 
+
+// Driver program to test 
+// above function 
+public static void main(String[] args)throws IOException 
+{ 
+	BufferedReader br= new BufferedReader(new InputStreamReader(System.in));
+    System.out.println("Enter a no.");
+    int n  = Integer.parseInt(br.readLine());
+
+	System.out.println(n+"th magic" + 
+	" number is " + nthMagicNo(n)); 
+} 
+} 
+
+
+// This code is contributed by 
+// prerna saini