Given two integers dividend and divisor, divide two integers without using multiplication, division, and mod operator.
The integer division should truncate toward zero, which means losing its fractional part. For example, 8.345 would be truncated to 8, and -2.7335 would be truncated to -2.
Return the quotient after dividing dividend by divisor.
Note: Assume we are dealing with an environment that could only store integers within the 32-bit signed integer range: [−231, 231 − 1]. For this problem, if the quotient is strictly greater than 231 - 1, then return 231 - 1, and if the quotient is strictly less than -231, then return -231.
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Example 1:
\n\n\nInput: dividend = 10, divisor = 3\nOutput: 3\nExplanation: 10/3 = 3.33333.. which is truncated to 3.\n\n\n
Example 2:
\n\n\nInput: dividend = 7, divisor = -3\nOutput: -2\nExplanation: 7/-3 = -2.33333.. which is truncated to -2.\n\n\n
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Constraints:
\n\n-231 <= dividend, divisor <= 231 - 1divisor != 0给你两个整数，被除数 dividend 和除数 divisor。将两数相除，要求 不使用 乘法、除法和取余运算。
整数除法应该向零截断，也就是截去（truncate）其小数部分。例如，8.345 将被截断为 8 ，-2.7335 将被截断至 -2 。
返回被除数 dividend 除以除数 divisor 得到的 商 。
注意：假设我们的环境只能存储 32 位 有符号整数，其数值范围是 [−231, 231 − 1] 。本题中，如果商 严格大于 231 − 1 ，则返回 231 − 1 ；如果商 严格小于 -231 ，则返回 -231 。
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示例 1:
\n\n\n输入: dividend = 10, divisor = 3\n输出: 3\n解释: 10/3 = 3.33333.. ，向零截断后得到 3 。\n\n
示例 2:
\n\n\n输入: dividend = 7, divisor = -3\n输出: -2\n解释: 7/-3 = -2.33333.. ，向零截断后得到 -2 。\n\n
\n\n
提示：
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