feat(*): Add 2021-01 files

2021/01/Program.cs

@@ -0,0 +1,53 @@
+using Creek.HelpfulExtensions;
+
+// Part 1
+int numberOfBiggerMeasurements = 0;
+
+string[] lines = File.ReadAllLines("input.txt");
+
+foreach (var (line, index) in lines.WithIndex())
+{
+    if (index > 0)
+    {
+        int previousReading = Int32.Parse(lines[index-1]);
+        int currentReading = Int32.Parse(line);
+        
+        if (currentReading > previousReading)
+        {
+            numberOfBiggerMeasurements += 1;
+        }
+    }
+}
+
+Console.WriteLine($"Part 1: {numberOfBiggerMeasurements}");
+
+
+// Part 2
+int numberOfBiggerSlidingTotals = 0;
+
+List<int> slidingTotals = new List<int>();
+
+for (int i = 0; i < lines.Count(); i++) 
+{
+  if (lines.Count() > i+2)
+  {
+      slidingTotals.Add(Int32.Parse(lines[i]) + Int32.Parse(lines[i+1]) + Int32.Parse(lines[i+2]));
+  }
+}
+
+
+foreach (var (total, index) in slidingTotals.WithIndex())
+{
+    if (index > 0)
+    {
+        int previousTotal = slidingTotals[index-1];
+        int currentTotal = total;
+        
+        if (currentTotal > previousTotal)
+        {
+            numberOfBiggerSlidingTotals += 1;
+        }
+    }
+}
+
+Console.WriteLine($"Part 2: {numberOfBiggerSlidingTotals}");