Counting the Carries
When adding A and B with the school algorithm, how many carry operations happen?
Input: one line with two integers A and B.
Output: the number of carries.
Constraints:
- 0 ≤ A, B ≤ 1018
Sample Tests
Input 1
555 545
Output 1
3
Input 2
123 456
Output 2
0
Discussion (opens after you solve — no spoilers before)
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