<h2 id="heading-url">URL</h2>
<p><a href="https://leetcode.com/problems/check-if-a-string-contains-all-binary-codes-of-size-k/" class="autolinkedURL autolinkedURL-url" target="_blank">leetcode.com/problems/check-if-a-string-con..</a></p>
<h2 id="heading-code">Code</h2>
<p><a href="https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1461/main.fsx" class="autolinkedURL autolinkedURL-url" target="_blank">github.com/syohex/dotnet-study/blob/master/..</a></p>
<pre><code class="lang-fsharp">open System

let hasAllCodes (s: string) (k: int) : bool =
    if s.Length &lt; k then
        false
    else
        let sets =
            seq { 0 .. (s.Length - k) }
            |&gt; Seq.map (fun i -&gt; s.Substring(i, k))
            |&gt; Seq.fold (fun acc s -&gt; Set.add s acc) Set.empty

        sets.Count = (Math.Pow(2, k) |&gt; int)
</code></pre>


## URL

https://leetcode.com/problems/check-if-a-string-contains-all-binary-codes-of-size-k/

## Code

https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1461/main.fsx

```fsharp
open System

let hasAllCodes (s: string) (k: int) : bool =
    if s.Length < k then
        false
    else
        let sets =
            seq { 0 .. (s.Length - k) }
            |> Seq.map (fun i -> s.Substring(i, k))
            |> Seq.fold (fun acc s -> Set.add s acc) Set.empty

        sets.Count = (Math.Pow(2, k) |> int)
```

LeetCode 1461. Check If a String Contains All Binary Codes of Size K in F#

URL

Code