From 000000200cec3ac8782e205ef2556e9e39151753 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matej=20Jane=C5=BEi=C4=8D?= <janezic.mj@gmail.com>
Date: Mon, 1 Dec 2025 22:39:29 +0100
Subject: [PATCH] feat: add solution 2019/01

---
 src/solution/year_2019/__init__.py |  0
 src/solution/year_2019/day_01.py   | 38 ++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 src/solution/year_2019/__init__.py
 create mode 100644 src/solution/year_2019/day_01.py

diff --git a/src/solution/year_2019/__init__.py b/src/solution/year_2019/__init__.py
new file mode 100644
index 000000000..e69de29
diff --git a/src/solution/year_2019/day_01.py b/src/solution/year_2019/day_01.py
new file mode 100644
index 000000000..195178a
--- /dev/null
+++ b/src/solution/year_2019/day_01.py
@@ -0,0 +1,38 @@
+from typing import Any
+
+
+def fuel_req(mass: int) -> int:
+    return max(mass // 3 - 2, 0)
+
+
+def rec_fuel_req(mass: int) -> int:
+    fuel = fuel_req(mass)
+
+    if fuel == 0:
+        return 0
+
+    return fuel + rec_fuel_req(fuel)
+
+
+def part_1_2(input_data: str) -> Any:
+    req1, req2 = 0, 0
+
+    for line in input_data.splitlines():
+        mass = int(line)
+        req1 += fuel_req(mass)
+        req2 += rec_fuel_req(mass)
+
+    return req1, req2
+
+
+def test_fuel_req() -> None:
+    assert fuel_req(12) == 2
+    assert fuel_req(14) == 2
+    assert fuel_req(1969) == 654
+    assert fuel_req(100756) == 33583
+
+
+def test_rec_fuel_req() -> None:
+    assert rec_fuel_req(14) == 2
+    assert rec_fuel_req(1969) == 966
+    assert rec_fuel_req(100756) == 50346