started advent of code 2021

day1_2.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+import sys, utils
+
+def find_increasing_window(l: list):
+    win = l[:3]  
+    count = 0
+    for n in range(3, len(l)):
+        new_win = [l[n-2], l[n-1], l[n]]
+        if sum(new_win) > sum(win):
+            count += 1
+        win = new_win
+    return count
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("please supply input file")
+        sys.exit()
+    f = utils.File(sys.argv[1])
+    print(find_increasing_window(f.get_ints()))
+
+