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该博客讨论了如何在不允许使用乘法、除法和取模运算的情况下，对32位整数进行除法运算，即找到两个整数的商。文章提供了三个不同的解决方案，并且特别指出当结果溢出时返回2^31 - 1。
Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator.
Return the quotient after dividing dividend by divisor.
The integer division should truncate toward zero.
Example 1:
Input: dividend = 10, divisor = 3 Output: 3
Example 2:
Input: dividend = 7, divisor = -3 Output: -2
Note:
- Both dividend and divisor will be 32-bit signed integers.
- The divisor will never be 0.
- Assume we are dealing with an environment which could only store integers within the 32-b
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