Day 2 - part 1

Author: delthia

2024/day02/input

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+#!/usr/bin/python3
+
+def parse_input(path:str) -> list[tuple[int]]:
+    with open(path) as file:
+        data = file.read().splitlines()
+
+    reports = [tuple(int(i) for i in line.split()) for line in data]
+
+    return reports
+
+positive = lambda n: True if n > 0 else False
+
+def count_safe(reports: list[tuple[int]]) -> int:
+    safe = 0
+
+    for report in reports:
+        prev = report[0]
+        sign = None
+
+        for pos in report[1:]:
+            dif = pos-prev
+
+            if abs(dif) > 3:
+                break
+            elif dif == 0:
+                break
+            elif positive(dif) != sign and sign is not None:
+                break
+
+            prev = pos
+            sign = positive(dif)
+        else:
+            safe += 1
+
+    return safe
+
+if __name__ == '__main__':
+    # reports = parse_input('test-input')
+    reports = parse_input('input')
+
+    # Part 1
+    safe = count_safe(reports)
+    print(f"{safe} reports are safe")

2024/day02/solution.py

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+7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9