2 files changed, 26 insertions, 1 deletions

diff --git a/2025/01/a.py b/2025/01/a.py
index 5fdb11b..114acb4 100644
--- a/2025/01/a.py
+++ b/2025/01/a.py
@@ -1,6 +1,12 @@
 import fileinput
 
+p = 50
+c = 0
 with fileinput.input() as lines:
         for line in lines:
-                ...
+                s = 1 if line[0] == "R" else -1
+                p = (p + s * int(line[1:])) % 100
+                if p == 0:
+                        c += 1
 
+print(c)
diff --git a/2025/01/b.py b/2025/01/b.py
new file mode 100644
index 0000000..ea32dc7
--- /dev/null
+++ b/2025/01/b.py
@@ -0,0 +1,19 @@
+import fileinput
+
+p = 50
+c = 0
+with fileinput.input() as lines:
+        for line in lines:
+                oldp = p
+                s = 1 if line[0] == "R" else -1
+                p += s * int(line[1:])
+                if p >= 100:
+                        d = p // 100
+                        c += d
+                        p -= d * 100
+                elif p <= 0:
+                        d = -p // 100 + 1
+                        c += d if oldp != 0 else d-1
+                        p = (p + d * 100) % 100
+
+print(c)