add day 1

1/part1.ps1

@@ -0,0 +1,6 @@
+(Get-Content input -Raw).Split("`n`n")
+| ForEach-Object {
+    ($_.Split("`n") | Measure-Object -Sum).Sum
+}
+| Sort-Object -Descending
+| Select-Object -First 1

1/part2.ps1

@@ -0,0 +1,8 @@
+(Get-Content input -Raw).Split("`n`n")
+| ForEach-Object {
+    ($_.Split("`n") | Measure-Object -Sum).Sum
+}
+| Sort-Object -Descending
+| Select-Object -First 3
+| Measure-Object -Sum
+| Select-Object -ExpandProperty Sum