diff --git a/day1/input1.txt b/day1/input.txt
similarity index 100%
rename from day1/input1.txt
rename to day1/input.txt
diff --git a/day1/part1.py b/day1/part1.py
index 10f93be..7f770a5 100644
--- a/day1/part1.py
+++ b/day1/part1.py
@@ -1,4 +1,4 @@
-file = "input1.txt"
+file = "input.txt"
 
 def main():
     current = 50
diff --git a/day1/part2.py b/day1/part2.py
new file mode 100644
index 0000000..c991c1c
--- /dev/null
+++ b/day1/part2.py
@@ -0,0 +1,24 @@
+file = "input.txt"
+
+def main():
+    current, count = 50, 0
+    print(f"{current} count:{count}")
+    for line in open(file):
+        direction, magnitude = line[:1], int(line[1:])
+        scalar = 1 if direction == "R" else -1
+        pre = current
+        current += scalar * magnitude
+        if current <= 0 and pre != 0: count += 1
+        count += abs(current) // 100
+        current = normalize(current)
+        print(f"{direction} {magnitude} => {current} count:{count}")
+
+def normalize(x):
+    if 0 <= x <= 99: return x
+    if x <= 0:
+        return normalize(100 + x)
+    else:
+        return normalize(x - 100)
+
+if __name__ == "__main__":
+    main()
diff --git a/day1/test.txt b/day1/test.txt
new file mode 100644
index 0000000..53287c7
--- /dev/null
+++ b/day1/test.txt
@@ -0,0 +1,10 @@
+L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82