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, sum;
	int i;
	
	while (scanf("%d %d", &a, &b)){
		sum = a + b;
		
		i = 0;
		while (sum!= 0){
			sum /= 10;
			i++;
		}
		
		printf("%d\n", i);
	}
	
	return (0);
}