Add day 7 solutions

1 files changed, 22 insertions, 0 deletions

diff --git a/2021/07/puzzles.py b/2021/07/puzzles.py
new file mode 100644
index 0000000..b0ccb32
--- /dev/null
+++ b/2021/07/puzzles.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+import math
+
+
+def gauss_sum(n: int) -> int:
+	# START PART 1
+	return n
+	# END PART 1 START PART 2
+	return n * (n + 1) // 2
+	# END PART 2
+
+
+def main() -> None:
+	with open("input", "r", encoding="utf-8") as f:
+		data = list(map(int, f.read().split(",")))
+
+	print(min(sum(gauss_sum(abs(i - data[j])) for j in range(len(data))) for i in range(max(data))))
+
+
+if __name__ == "__main__":
+	main()