Digit Number

Write a program which computes the digit number of sum of two integersaandb.

Input

There are several test cases. Each test case consists of two non-negative integersaandbwhich 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 ofa+bfor each data set.

Sample Input

5 7
1 99
1000 999

Output for the Sample Input

2
3
4

問題簡述：（略）

問題分析：

輸入兩個整數求其和，然後計算其位數。按照進位制原理來就可以了，不斷用１０除移位，直到和變為０為止，就可以計數其位數。

題記：功能封裝到函式是個好主意。

參考連結：（略）

AC的C語言程式如下：

/* AOJ0002 Digit Number */

#include <stdio.h>

int sum_digits(int n, int base)
{
    int count = 0;

    while(n) {
        count++;
        n /= base;
    }

    return count;
}

int main(void)
{
    int a, b;

    while(~scanf("%d%d", &a, &b))
        printf("%d\n", sum_digits(a + b, 10));

    return 0;
}