added precision_root_algo

Misc/root_precision

@@ -0,0 +1,28 @@
+import java.io.*;
+import java.util.*;
+import java.text.*;
+import java.math.*;
+import java.util.regex.*;
+
+public class Solution {
+
+    public static void main(String[] args) {
+      Scanner scn = new Scanner(System.in);
+      
+      int N = scn.nextInt();
+      int P = scn.nextInt();
+      
+      System.out.println(squareRoot(N, P));
+   }
+   
+   public static double squareRoot(int N, int P) {
+      double sqrt = 0;;
+      
+        // Write your code here
+       double root = Math.pow(N, 0.5);
+		int pre = (int) Math.pow(10, P);
+		root = root * pre;
+	   sqrt =  (int)root;
+      return (double)sqrt/pre;
+   }
+}