Problem:
Digit Number

Write a program which computes the digit number of sum of two integers a and b.

Input

There are several test cases. Each test case consists of two non-negative integers a and b which are separeted by a space in a line. The input terminates with EOF.

Constraints

0 ≤ a, b ≤ 1,000,000

The number of datasets ≤ 200

Output

Print the number of digits of a + b for each data set.

Sample Input

5 7
1 99
1000 999

Output for the Sample Input

2
3
4

Solution in Scala (judge verdict: Wrong Answer)

object Main{
  def main(args: Array[String]) {
    val sc = new java.util.Scanner(System.in)
    while(sc.hasNext){
      println((sc.nextInt() * sc.nextInt()).toString().length().toString())
    }
  }
}