diff --git a/2023/day14.py b/2023/day14.py
index 992bf35..40360c0 100644
--- a/2023/day14.py
+++ b/2023/day14.py
@@ -1,13 +1,68 @@
 import sys
-from collections import defaultdict
-from dataclasses import dataclass
+from typing import TypeAlias
 
-lines = sys.stdin.read().splitlines()
+RockGrid: TypeAlias = list[list[str]]
+
+rocks0 = [list(line) for line in sys.stdin.read().splitlines()]
+
+
+def slide_rocks_top(rocks: RockGrid) -> RockGrid:
+    top = [0 if c == "." else 1 for c in rocks[0]]
+    for row in range(1, len(rocks)):
+        for col in range(len(rocks[0])):
+            match rocks[row][col]:
+                case "O":
+                    if top[col] != row:
+                        rocks[top[col]][col] = "O"
+                        rocks[row][col] = "."
+                    top[col] = top[col] + 1
+                case "#":
+                    top[col] = row + 1
+                case _:
+                    pass
+    return rocks
+
+
+def cycle(rocks: RockGrid) -> RockGrid:
+    for _ in range(4):
+        rocks = slide_rocks_top(rocks)
+        rocks = [
+            [rocks[len(rocks) - j - 1][i] for j in range(len(rocks))]
+            for i in range(len(rocks[0]))
+        ]
+
+    return rocks
+
+
+rocks = slide_rocks_top([[c for c in r] for r in rocks0])
 
 # part 1
-answer_1 = ...
+answer_1 = sum(
+    (len(rocks) - i) * sum(1 for c in row if c == "O") for i, row in enumerate(rocks)
+)
 print(f"answer 1 is {answer_1}")
 
 # part 2
-answer_2 = ...
+rocks = rocks0
+
+N = 1000000000
+cycles: list[RockGrid] = []
+i_cycle: int = -1
+for i_cycle in range(N):
+    rocks = cycle(rocks)
+
+    if any(rocks == c for c in cycles):
+        break
+
+    cycles.append([[c for c in r] for r in rocks])
+
+cycle_start = next(i for i in range(len(cycles)) if (rocks == cycles[i]))
+cycle_length = i_cycle - cycle_start
+
+ci = cycle_start + (N - cycle_start) % cycle_length - 1
+
+answer_2 = sum(
+    (len(rocks) - i) * sum(1 for c in row if c == "O")
+    for i, row in enumerate(cycles[ci])
+)
 print(f"answer 2 is {answer_2}")
diff --git a/2023/inputs/day14.txt b/2023/inputs/day14.txt
index e69de29..7289ab7 100644
--- a/2023/inputs/day14.txt
+++ b/2023/inputs/day14.txt
@@ -0,0 +1,100 @@
+#.###...OO.#.O.O..O#.....#O#..O....#.#OO....O..#.....O##..#....#..#O...OOO#....##...OO#..O....O....O
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+..#...#..O.#O#..OO#O..#O.....O...#.............OO.O..O...O...O....O....#.#.#O........#...O..OO#..#.#
+#.........#..#....O##.O#...O#..O#....O.##O.#.#..#....#..OO..#..##..O.##.O#..O#.....O......O....#O...
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diff --git a/2023/tests/day14.txt b/2023/tests/day14.txt
index e69de29..5a24dce 100644
--- a/2023/tests/day14.txt
+++ b/2023/tests/day14.txt
@@ -0,0 +1,10 @@
+O....#....
+O.OO#....#
+.....##...
+OO.#O....O
+.O.....O#.
+O.#..O.#.#
+..O..#O..O
+.......O..
+#....###..
+#OO..#....