added day 09

09/solve01.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+
+
+def get_neighour(heightmap, x, y, deltax, deltay):
+	if x+deltax < 0:
+		return 10
+	if y+deltay < 0:
+		return 10
+	try:
+		return heightmap[y+deltay][x+deltax]
+	except IndexError:
+		return 10
+
+def check_low_point(heightmap, x, y):
+	xy = heightmap[y][x]
+	if get_neighour(heightmap,x,y, 1,0) <= xy:
+		return 0
+	if get_neighour(heightmap,x,y, -1,0) <= xy:
+		return 0
+	if get_neighour(heightmap,x,y, 0,1) <= xy:
+		return 0
+	if get_neighour(heightmap,x,y, 0,-1) <= xy:
+		return 0
+	#print("found basin at %d:%d" % (x, y))
+	return xy+1
+
+heightmap = []
+
+with open("input01.txt","r") as f:
+	for line in f:
+		heightmap.append([int(x) for x in list(line.strip())])
+
+result = 0
+for y in range(len(heightmap)):
+	for x in range(len(heightmap[y])):
+		result += check_low_point(heightmap, x,y)
+
+print(result)