Day4

566. Reshape the Matrix/566. Reshape the Matrix.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_566._Reshape_the_Matrix</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

566. Reshape the Matrix/Program.cs

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+namespace _566._Reshape_the_Matrix
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            var res = new Solution().MatrixReshape(new int[][] { new int[] { 1,2 }, new int[] { 4, 5 } }, 2, 4);
+            foreach(var row in res)
+                Console.WriteLine(String.Join(" ", row));
+        }
+    }
+}

566. Reshape the Matrix/Solution.cs

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+namespace _566._Reshape_the_Matrix;
+
+public class Solution
+{
+    public int[][] MatrixReshape(int[][] mat, int r, int c)
+    {
+        int[][] result = new int[r][];
+        for (int i = 0; i < result.Length; i++)
+            result[i] = new int[c];
+
+        int height = mat.Length;
+        int width = mat[0].Length;
+        int size = r * c;
+        if (size != height * width)
+            return mat;
+        for(int i = 0; i < size; i++)
+        {
+            int ySource = i / width;
+            int xSource = i % width;
+
+            int yTo = i / c;
+            int xTo = i % c;
+            result[yTo][xTo] = mat[ySource][xSource];
+        }
+        return result;
+    }
+}