2023: Day 1.

2023/day1.py

@@ -0,0 +1,45 @@
+import string
+import sys
+
+lines = sys.stdin.read().split("\n")
+
+lookups_1 = {d: int(d) for d in string.digits}
+lookups_2 = lookups_1 | {
+    d: i + 1
+    for i, d in enumerate(
+        (
+            "one",
+            "two",
+            "three",
+            "four",
+            "five",
+            "six",
+            "seven",
+            "eight",
+            "nine",
+        )
+    )
+}
+
+
+def find_values(lookups: dict[str, int]) -> list[int]:
+    values: list[int] = []
+
+    for line in filter(bool, lines):
+        first_digit = min(
+            lookups,
+            key=lambda lookup: index
+            if (index := line.find(lookup)) >= 0
+            else len(line),
+        )
+        last_digit = max(
+            lookups,
+            key=lambda lookup: index if (index := line.rfind(lookup)) >= 0 else 0,
+        )
+        values.append(10 * lookups[first_digit] + lookups[last_digit])
+
+    return values
+
+
+print(f"answer 1 is {sum(find_values(lookups_1))}")
+print(f"answer 2 is {sum(find_values(lookups_2))}")

2023/tests/day1.txt

@@ -0,0 +1,7 @@
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen

2023/tests/day1_p1.txt

@@ -0,0 +1,4 @@
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet

run.ps1

@@ -1,5 +1,11 @@
-param([switch]$Test, $day)
+param(
+    [switch]$Test,
+    [PSDefaultValue()]
+    [Parameter(Mandatory = $false)]
+    $Year = 2023,
+    [Parameter(Mandatory = $true, Position = 0)]
+    $Day)
 
 $folder = $Test ? "tests" : "inputs"
 
-Get-Content ".\2022\$folder\day$day.txt" | python ".\2022\day$day.py"
+Get-Content ".\$Year\$folder\day$Day.txt" | python ".\$Year\day$Day.py"