<h2 id="heading-url">URL</h2>
<p><a href="https://leetcode.com/problems/maximum-sum-of-an-hourglass/" class="autolinkedURL autolinkedURL-url" target="_blank">leetcode.com/problems/maximum-sum-of-an-hou..</a></p>
<h2 id="heading-code">Code</h2>
<p><a href="https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/2428/main.fsx" class="autolinkedURL autolinkedURL-url" target="_blank">github.com/syohex/dotnet-study/blob/master/..</a></p>
<pre><code class="lang-fsharp">let maxSum (grid: int [,]) : int =
    let rows = Array2D.length1 grid
    let cols = Array2D.length2 grid

    let mutable ret = 0

    for i in 0 .. (rows - 3) do
        for j in 0 .. (cols - 3) do
            let mutable sum = 0

            for x in 0..2 do
                for y in 0..2 do
                    if not ((x = 1 &amp;&amp; y = 0) || (x = 1 &amp;&amp; y = 2)) then
                        sum &lt;- sum + grid.[i + x, j + y]

            ret &lt;- System.Math.Max(ret, sum)

    ret
</code></pre>


## URL

https://leetcode.com/problems/maximum-sum-of-an-hourglass/

## Code

https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/2428/main.fsx

```fsharp
let maxSum (grid: int [,]) : int =
    let rows = Array2D.length1 grid
    let cols = Array2D.length2 grid

    let mutable ret = 0

    for i in 0 .. (rows - 3) do
        for j in 0 .. (cols - 3) do
            let mutable sum = 0

            for x in 0..2 do
                for y in 0..2 do
                    if not ((x = 1 && y = 0) || (x = 1 && y = 2)) then
                        sum <- sum + grid.[i + x, j + y]

            ret <- System.Math.Max(ret, sum)

    ret
```

LeetCode 2428. Maximum Sum of an Hourglass in F#

URL

Code