## 487. Max Consecutive Ones II

Given a binary array, find the maximum number of consecutive 1s in this array if you can flip at most one 0.

**Example 1:**

Input:[1,0,1,1,0]Output:4Explanation:Flip the first zero will get the the maximum number of consecutive 1s. After flipping, the maximum number of consecutive 1s is 4.

**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

**Follow up:**

What if the input numbers come in one by one as an **infinite stream**? In other words, you can't store all numbers coming from the stream as it's too large to hold in memory. Could you solve it efficiently?

## Rust Solution

```
struct Solution;
use std::collections::VecDeque;
impl Solution {
fn find_max_consecutive_ones(nums: Vec<i32>) -> i32 {
let n = nums.len();
let mut res = 0;
let mut queue: VecDeque<usize> = VecDeque::from(vec![0, 0]);
for i in 0..n {
*queue.back_mut().unwrap() += 1;
if nums[i] == 0 {
queue.pop_front();
queue.push_back(0);
}
res = res.max(queue.iter().sum());
}
res as i32
}
}
#[test]
fn test() {
let nums = vec![1, 0, 1, 1, 0];
let res = 4;
assert_eq!(Solution::find_max_consecutive_ones(nums), res);
let nums = vec![1, 1, 0, 1];
let res = 4;
assert_eq!(Solution::find_max_consecutive_ones(nums), res);
}
```

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