152. Maximum Product Subarray
Find the contiguous subarray within an array (containing at least one number) which has the largest product.
For example, given the array [2,3,-2,4],
the contiguous subarray [2,3] has the largest product = 6.
解法
记录每次乘积的最大值和最小值,以及当前值,取最大的值。
public class Solution {
public int maxProduct(int[] nums) {
if (nums == null || nums.length == 0) {
return 0;
}
int max = nums[0], min = nums[0], result = nums[0];
for (int i = 1; i < nums.length; i++) {
int temp = max;
max = Math.max(Math.max(max * nums[i], min * nums[i]), nums[i]);
min = Math.min(Math.min(temp * nums[i], min * nums[i]), nums[i]);
if (max > result) {
result = max;
}
}
return result;
}
}
本文介绍了一种高效算法来解决寻找具有最大乘积的连续子数组问题。通过跟踪最大值和最小值来应对负数翻转的情况,并提供了一个Java实现示例。
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