Add Day 2

adventofcode/2024/day/02/red-nosed_reports.py

@@ -0,0 +1,29 @@
+import sys
+
+data = []
+part_one = 0
+
+while True:
+    levels = [int(x) for x in sys.stdin.readline().strip().split()]
+    if len(levels) == 0: break
+    data.append(levels)
+    deltas = [b - a for a, b in zip(levels, levels[1:])]
+    part_one += [x for x in deltas if 0 < abs(x) < 4] == deltas and all(x * deltas[0] >= 0 for x in deltas)
+
+del deltas, levels
+
+print('Part one:', part_one)
+
+part_two = 0
+
+def is_decreasing_type_of_safe(levels, switch=1):
+    for i in range(len(levels) - 1):
+        if not 1 <= levels[i] - levels[i + 1] <= 3:
+            return switch and any(fun(levels[j-1:j] + levels[j+1:], 0) for j in (i, i + 1))
+    return True
+
+fun = is_decreasing_type_of_safe
+for levels in data:
+    part_two += fun(levels) or fun(levels[::-1])
+
+print('Part two:', part_two)