Day6. Namespace style

383. Ransom Note/383. Ransom Note.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_383._Ransom_Note</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

383. Ransom Note/Program.cs

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+namespace _383._Ransom_Note;
+
+internal class Program
+{
+    static void Main(string[] args)
+    {
+        Console.WriteLine(new Solution().CanConstruct("a", "b"));
+    }
+}

383. Ransom Note/Solution.cs

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+namespace _383._Ransom_Note;
+
+public class Solution
+{
+    public bool CanConstruct(string ransomNote, string magazine)
+    {
+        if (ransomNote.Length > magazine.Length)
+            return false;
+        Dictionary<char, int> note = CountChars(ransomNote);
+        Dictionary<char, int> mag = CountChars(magazine);
+        foreach (var kp in note)
+        {
+            if (mag.ContainsKey(kp.Key))
+            {
+                if (mag[kp.Key] < kp.Value)
+                    return false;
+            }
+            else
+                return false;
+        }
+        return true;
+    }
+
+    private Dictionary<char, int> CountChars(string str)
+    {
+        Dictionary<char, int> dict = new Dictionary<char, int>();
+        foreach (char ch in str)
+        {
+            if (dict.ContainsKey(ch))
+                dict[ch]++;
+            else
+                dict.Add(ch, 1);
+        }
+        return dict;
+    }
+}