LeetCode 628. Maximum Product of Three Numbers

LeetCode 628. Maximum Product of Three Numbers

Description:

Given an integer array, find three numbers whose product is maximum and output the maximum product.

Example 1:

Input: [1,2,3]
Output: 6

Example 2:

Input: [1,2,3,4]
Output: 24

---

分析：

这道题很简单，先按从小到大排序，考虑后三个数的乘积、前两个数（负数）和最后一个数的乘积，这两个乘积孰大孰小即可。

代码如下：

class Solution {
public:
    int maximumProduct(vector<int>& nums) {
        sort(nums.begin(), nums.end());
        int size = nums.size();
        int temp1 = nums[size - 1] * nums[size - 2] * nums[size - 3];
        int temp2 = nums[0] * nums[1] * nums[size - 1];
        return temp1 > temp2 ? temp1 : temp2;
    }
};