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: Accepted)

object Main extends App {
  var line = scala.io.StdIn.readLine
  while (line != null) {
    val list = line.split(" ").map(_.toInt)
    println((list(0) + list(1)).toString.length)
    line = scala.io.StdIn.readLine
  }
}