Day 13, 2017 - Part I

Author: scottshepard

2017/day13.py

@@ -0,0 +1,88 @@
+import os
+
+class Firewall:
+    def __init__(self, layers):
+        self.layers = []
+        self.parse(layers)
+        self.hacker = 0
+        self.severity = 0
+        self.layers[self.hacker].hacker = True
+
+    def __iter__(self):
+        return self
+
+    def __repr__(self):
+        return self.__str__()
+
+    def __str__(self):
+        return str(self.layers)
+
+    def parse(self, layers):
+        for layer in layers:
+            d, r = layer.split(':')
+            self.layers.append(Layer(int(d), int(r)))
+        return self.layers
+
+    def next(self):
+        for layer in self.layers:
+            self.severity += next(layer)
+        self.layers[self.hacker].hacker = False
+        self.hacker += 1
+        if self.hacker < len(self.layers):
+            self.layers[self.hacker].hacker = True
+        return self
+
+    def solve(self):
+        for i in range(0, len(self.layers)):
+            next(self)
+        return self.severity
+
+class Layer:
+    def __init__(self, depth, rnge):
+        self.depth = depth
+        self.range = rnge
+        self.scanner = 0
+        self.direction = 1
+        self.empty = (self.range == 1)
+        self.hacker = False
+
+    def __repr__(self):
+        return self.__str__()
+
+    def __str__(self):
+        if self.empty:
+            if self.hacker:
+                return str(['X'])
+            else:
+                return str([])
+        else:
+            arr = [[] for i in range(0, self.range)]
+            arr[self.scanner] = ['S']
+            if self.hacker:
+                arr[0].append('X')
+            return str(arr)
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        severity = self.severity()
+        self.scanner += self.direction
+        if (self.scanner == self.range-1) or (self.scanner == 0):
+            self.direction = -self.direction
+        return severity
+
+    def severity(self):
+        if self.hacker and self.scanner == 0 and self.range > 1:
+            return self.depth * self.range
+        else:
+            return 0
+
+    
+if __name__ == '__main__':    
+    rel_path = os.path.dirname(os.path.abspath(__file__))
+    file_path = os.path.join(rel_path, "inputs/day13.txt")
+    f = open(file_path)
+    data = f.read().split('\n')
+    fw = Firewall(data)
+    print(fw.solve())

2017/inputs/day13.txt

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+0: 4
+1: 2
+2: 3
+3: 1
+4: 4
+5: 1
+6: 8
+7: 1
+8: 5
+9: 1
+10: 8
+11: 1
+12: 6
+13: 1
+14: 6
+15: 1
+16: 8
+17: 1
+18: 6
+19: 1
+20: 6
+21: 1
+22: 12
+23: 1
+24: 12
+25: 1
+26: 10
+27: 1
+28: 8
+29: 1
+30: 12
+31: 1
+32: 8
+33: 1
+34: 12
+35: 1
+36: 9
+37: 1
+38: 12
+39: 1
+40: 8
+41: 1
+42: 12
+43: 1
+44: 17
+45: 1
+46: 14
+47: 1
+48: 12
+49: 1
+50: 10
+51: 1
+52: 20
+53: 1
+54: 12
+55: 1
+56: 14
+57: 1
+58: 14
+59: 1
+60: 14
+61: 1
+62: 12
+63: 1
+64: 14
+65: 1
+66: 14
+67: 1
+68: 14
+69: 1
+70: 14
+71: 1
+72: 12
+73: 1
+74: 14
+75: 1
+76: 14
+77: 1
+78: 1
+79: 1
+80: 14
+81: 1
+82: 1
+83: 1
+84: 18
+85: 1
+86: 1
+87: 1
+88: 14

2017/inputs/day13_test.txt

@@ -0,0 +1,7 @@
+0: 3
+1: 2
+2: 1
+3: 1
+4: 4
+5: 1
+6: 4