another day of coding

18/input

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18/input1

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+.#.#.#
+...##.
+#....#
+..#...
+#.#..#
+####..

18/part1.py

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+#!/usr/bin/python
+
+import re
+
+RE_INGRADIENT_INFO = re.compile(r'^(.*): capacity (-?\d+), durability (-?\d+), flavor (-?\d+), texture (-?\d+), calories (-?\d+)$')
+
+
+def read_file(filename):
+    file = open(filename, 'r')
+    while True:
+        line = file.readline()
+        if not line:
+            break
+        yield line
+
+
+def get_neighbors(lights, posX, posY, minX, minY, maxX, maxY):
+    lightsOn = 0
+    lightsOff = 0
+
+    for x in range(posX-1, posX+2):
+        if x < minX or x > maxX:
+            continue
+        for y in range(posY-1, posY+2):
+            if y < minY or y > maxY:
+                continue
+            if x == posX and y == posY:
+                continue
+            if lights[x][y] == '#':
+                lightsOn += 1
+            if lights[x][y] == '.':
+                lightsOff += 1
+    return (lightsOn, lightsOff)
+
+
+def do_one_step(lights, sizeX, sizeY):
+    result = []
+    for x in range(sizeX):
+        line = ""
+        for y in range(sizeY):
+            light = lights[x][y]
+            (on, off) = get_neighbors(lights, x, y, 0, 0, sizeX-1, sizeY-1)
+#            print "[%d, %d]: on:%d off: %d" % (x, y, on, off)
+            if lights[x][y] == '#':
+                if on != 2 and on != 3:
+                    light = '.'
+            if lights[x][y] == '.':
+                if on == 3:
+                    light = '#'
+            line = line + light
+        result.append(line)
+
+    return result
+
+
+def main():
+    lights = []
+    for line in read_file('input'):
+        lights.append(line.strip())
+
+    for i in range(100):
+        print "iteration: %d" % i
+        lights = do_one_step(lights, 100, 100)
+
+    on = 0
+    for line in lights:
+        on += line.count('#')
+    print on
+
+if __name__ == "__main__":
+    main()

18/part2.py

@@ -0,0 +1,78 @@
+#!/usr/bin/python
+
+import re
+
+RE_INGRADIENT_INFO = re.compile(r'^(.*): capacity (-?\d+), durability (-?\d+), flavor (-?\d+), texture (-?\d+), calories (-?\d+)$')
+
+
+def read_file(filename):
+    file = open(filename, 'r')
+    while True:
+        line = file.readline()
+        if not line:
+            break
+        yield line
+
+
+def get_neighbors(lights, posX, posY, minX, minY, maxX, maxY):
+    lightsOn = 0
+    lightsOff = 0
+
+    for x in range(posX-1, posX+2):
+        if x < minX or x > maxX:
+            continue
+        for y in range(posY-1, posY+2):
+            if y < minY or y > maxY:
+                continue
+            if x == posX and y == posY:
+                continue
+            if lights[x][y] == '#':
+                lightsOn += 1
+            if lights[x][y] == '.':
+                lightsOff += 1
+    return (lightsOn, lightsOff)
+
+
+def do_one_step(lights, sizeX, sizeY):
+    result = []
+    for x in range(sizeX):
+        line = ""
+        for y in range(sizeY):
+            light = lights[x][y]
+            (on, off) = get_neighbors(lights, x, y, 0, 0, sizeX-1, sizeY-1)
+#            print "[%d, %d]: on:%d off: %d" % (x, y, on, off)
+            if lights[x][y] == '#':
+                if on != 2 and on != 3:
+                    light = '.'
+            if lights[x][y] == '.':
+                if on == 3:
+                    light = '#'
+            if x == 0 and (y == 0 or y == sizeY-1):
+                light = '#'
+            if x == sizeX-1 and (y == 0 or y == sizeY-1):
+                light = '#'
+            line = line + light
+        result.append(line)
+
+    return result
+
+
+def main():
+    lights = []
+    for line in read_file('input'):
+        lights.append(line.strip())
+
+    lights[0] = "#" + lights[0][1:-1] + "#"
+    lights[99] = "#" + lights[99][1:-1] + "#"
+
+    for i in range(100):
+        print "iteration: %d" % i
+        lights = do_one_step(lights, 100, 100)
+
+    on = 0
+    for line in lights:
+        on += line.count('#')
+    print on
+
+if __name__ == "__main__":
+    main()