[暖手][学习阶段-各路杂题][HDU-1018]Big Number

Problem Description

In many applications very large integers numbers are required. Some of these applications are using keys for secure transmission of data,encryption,etc. In this problem you are given a number,you have to determine the number of digits in the factorial of the number.

 

Input

Input consists of several lines of integer numbers. The first line contains an integer n,which is the number of cases to be tested,followed by n lines,one integer 1 ≤ n ≤ 10 ⁷ on each line.

 

Output

The output contains the number of digits in the factorial of the integers appearing in the input.

 

Sample Input

  
  

   
   2
10
20
  
  

 

Sample Output

  
  

   
   7
19
  
  

 

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// Todo Auto-generated method stub
		Scanner in = new Scanner(system.in);
		
		int T = in.nextInt();
		
		while(T>0){
			int n = in.nextInt();
			int len =  (int) (0.5*Math.log10(2*3.1415927*n)+n*Math.log10(n/2.718281828459));
			System.out.println(len+1);
			T--;
		}
		}
	}