EOJ-自适应编程学习平台

Write a program which computes the digit number of sum of two integers $a$ and $b$.

The first line of input gives the number of cases, $N(1 \leqslant N \leqslant 100)$. $N$ test cases follow.

Each test case consists of two integers $a$ and $b$ which are separeted by a space in a line. $(0 \leqslant a,b \leqslant 100000000)$.

For each test case, print the number of digits of $a + b$.