Day4

118. Pascal's Triangle/118. Pascal's Triangle.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_118._Pascal_s_Triangle</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

118. Pascal's Triangle/Program.cs

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+namespace _118._Pascal_s_Triangle
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            var res = new Solution().Generate(300);
+            foreach(var r in res)
+                Console.WriteLine(String.Join(" ", r));
+        }
+    }
+}

118. Pascal's Triangle/Solution.cs

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+namespace _118._Pascal_s_Triangle;
+
+public class Solution
+{
+    public IList<IList<int>> Generate(int numRows)
+    {
+        List<IList<int>> triangle = new List<IList<int>>() { new List<int> { 1 } };
+        if(numRows > 1)
+            triangle.Add(new List<int>() { 1,1 });
+        numRows -= 2;
+        while (numRows-- > 0)
+        {
+            IList<int> prev = triangle[^1];
+            int nextCount = prev.Count;
+            List<int> row = new List<int>() { 1 };
+            for(int i = 1; i < nextCount; i++)
+            {
+                row.Add(prev[i-1] + prev[i]);
+            }
+            row.Add(1); 
+            triangle.Add(row);
+        }
+
+        return triangle;
+    }
+}