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Correct answer will be upvoted else downvoted. Computer science.
You are given two positive (more noteworthy than nothing) integers x and y. There is a variable k at first set to 0.
You can play out the accompanying two kinds of tasks:
add 1 to k (i. e. allocate k:=k+1);
add x⋅10p to k for some non-negative p (i. e. relegate k:=k+x⋅10p for some p≥0).
Track down the base number of tasks depicted above to set the worth of k to y.
Input
The main line contains one integer t (1≤t≤2⋅104) — the number of experiments.
Each experiment comprises of one line containing two integer x and y (1≤x,y≤109).
Output
For each experiment, print one integer — the base number of tasks to set the worth of k to y.
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