[Leetcode]485. Max Consecutive Ones

Given a binary array, find the maximum number of consecutive 1s in this array.

Example 1:

Input: [1,1,0,1,1,1]
Output: 3
Explanation: The first two digits or the last three digits are consecutive 1s.
    The maximum number of consecutive 1s is 3.

 

Note:

• The input array will only contain 0 and 1.
• The length of input array is a positive integer and will not exceed 10,000

思路：如果一开始传进来数组为空，则返回0。否则，设置两个变量maxConsecutiveOnes 和consecutiveOnes，

consecutiveOnes统计连续 1 的个数，如果某个位置导致连续中断，则把consecutiveOnes 赋0，继续统计后面的。

这个过程中把最大的consecutiveOnes值赋给maxConsecutiveOnes，代码如下

 

class Solution {
    public int findMaxConsecutiveOnes(int[] nums) {
        if (nums.length==0)
            return 0;
        int consecutiveOnes = 0,maxConsecutiveOnes = 0;
        for (int i=0;i<nums.length;i++){
            if (nums[i]==1)
                consecutiveOnes++;
            else 
                consecutiveOnes=0;
            if (consecutiveOnes>maxConsecutiveOnes)
                maxConsecutiveOnes = consecutiveOnes;
        }
        return maxConsecutiveOnes;
    }
}