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# Flipping String

Problem Description

You are given an numeric string A which only contains 0's and 1's. You have to find a range, such that if we flip all the elements within the range, we will get largest substring of contiguous 1's.

Return the length of largest substring of contiguous 1's after flipping exactly one substring.

NOTE:

• Given string always contains atleast one zero.

• Problem Constraints

1 <= |A| <= 105

Input Format

First and only argument is an string A.

Output Format

Return an integer denoting the length of largest substring of contiguous 1's after flipping exactly one substring.

Example Input

Input 1:

``` A = "000"
```

Input 2:

``` A = "10010"
```

Example Output

Output 1:

``` 3
```

Output 2:

``` 4
```

Example Explanation

Explanation 1:

``` Flip the substring [0:2] then A = "111" so answer will be 3
```

Explanation 2:

``` Flip the substring [1:2] then A = "11110" so answer will be 4
```

NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a question? Checkout Sample Codes for more details.
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