7/4 problem solving by 7/11

[kimmikimmi]

• https://leetcode.com/problems/valid-phone-numbers/
• https://leetcode.com/problems/reverse-integer/

[jonghagi77]

Input: 1534236469 Output: 9646324351 Expected: 0

왜 틀렸는지 이해가 안되는데..? 왜 expected 가 0이지..?

[kimmikimmi]

32-bit signed integer range: [−2^31, 2^31 − 1] (https://github.com/kimmikimmi/leetcode_problem_solving/blob/develop/hyunjunkim/go-algo/reverse_integer.go)