题解 | #三个数的最大乘积#

using System;
using System.Collections.Generic;


class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 最大乘积
     * @param A int整型一维数组
     * @return long长整型
     */
    public long solve (List<int> A) {
        // write code here
        if (A == null)
            return 0;
        if (A.Count < 3)
            return 0;
        A.Sort();
        int nLen = A.Count;
        long nMaxF = (long)A[nLen - 1] * (long)A[nLen - 2] * (long)A[nLen - 3];
        long nMaxS = (long)A[0] * (long)A[1] * (long)A[nLen - 1];
        return nMaxF > nMaxS ? nMaxF : nMaxS;
    }
}