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 C (judge verdict: Time Limit Exceeded)

#include<stdio.h>
int main(void){
  int a,b,n,m;
  while(1){
    scanf("%d %d",&a,&b);
    n = 0;
    if(a==0&&b==0)return(0);
    m = a + b;
    while(m>=10){
      m /= 10;
      n++;
    }
    printf("%d\n",n+1);
  }
  return(0);
}