DivideTwoIntegers.php

<?php

namespace App;

/**
 * Divide Two Integers
 *
 * 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.
 *
 * Example 1:
 * Input: dividend = 10, divisor = 3
 * Output: 3
 * Explanation: 10/3 = 3.33333.. which is truncated to 3.
 *
 * Example 2:
 * Input: dividend = 7, divisor = -3
 * Output: -2
 * Explanation: 7/-3 = -2.33333.. which is truncated to -2.
 *
 * https://leetcode.com/problems/divide-two-integers
 */
class DivideTwoIntegers
{
    /**
     * @param int $dividend
     * @param int $divisor
     * @return int
     */
    public function divide(int $dividend, int $divisor): int
    {
        $result = (int) ($dividend / $divisor);
        $max_limit = 2 ** 31;
        if ($result >= $max_limit) {
            return ($max_limit - 1);
        }
        return $result;
    }
}