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单点时限: 2.0 sec
内存限制: 256 MB
Write a program which computes the digit number of sum of two integers and .
The first line of input gives the number of cases, . test cases follow.
Each test case consists of two integers and which are separeted by a space in a line. .
For each test case, print the number of digits of .
3 5 7 1 99 1000 999
2 3 4