485-Max-Consecutive-Ones.md

485. Max Consecutive Ones

2017-03-06

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

Solution

class Solution {
    func findMaxConsecutiveOnes(_ nums: [Int]) -> Int {
        return nums.reduce([0, 0]) { $1 == 0 ? [0, max($0[0], $0[1])] : [$0[0] + 1, $0[1]] }.max() ?? 0
    }
}