codeforce:263 div2 A
codeforces:#263 Div.2 B
codeforces:recursive solution to #263 Div.2 C
leetcode:divide two integers
leetcode:binary method solution for Divide Two Integers Problem
leetcode:cpp solution with the same binary algorithm
leetcode:integer overflow bug
leetcode:use long long to avoid integer overflow
leetcode:initialize mid in each iteration
leetcode:cpp solution