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>
#include<math.h>
int main(){
	int a,b,c,count;
	while(scanf("%d %d",&a,&b)!=0){
		count=0;
		c=a+b;
		//printf("%d %d\n",a,b);
		while(c){
			c=c/10;
			count++;
		}
		printf("%d\n",count);
	}
	return 0;
}