Add solution to day2 part 1

day2/input.txt

@@ -0,0 +1 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,1,10,19,1,6,19,23,1,10,23,27,2,27,13,31,1,31,6,35,2,6,35,39,1,39,5,43,1,6,43,47,2,6,47,51,1,51,5,55,2,55,9,59,1,6,59,63,1,9,63,67,1,67,10,71,2,9,71,75,1,6,75,79,1,5,79,83,2,83,10,87,1,87,5,91,1,91,9,95,1,6,95,99,2,99,10,103,1,103,5,107,2,107,6,111,1,111,5,115,1,9,115,119,2,119,10,123,1,6,123,127,2,13,127,131,1,131,6,135,1,135,10,139,1,13,139,143,1,143,13,147,1,5,147,151,1,151,2,155,1,155,5,0,99,2,0,14,0

day2/main.py

@@ -0,0 +1,31 @@
+import itertools
+
+
+def part1(inputs):
+    inputs[1] = 12
+    inputs[2] = 2
+    for i, opcode in itertools.islice(enumerate(inputs), 0, None, 4):
+        operation = None
+        # Terminate opcode
+        if opcode == 99:
+            break
+        elif opcode == 1:
+            operation = lambda a, b: a + b
+        elif opcode == 2:
+            operation = lambda a, b: a * b
+        else:
+            raise Exception('Bad opcode: ' + str(opcode))
+
+        input_a_index = inputs[i + 1]
+        input_b_index = inputs[i + 2]
+        out_index = inputs[i + 3]
+        inputs[out_index] = operation(inputs[input_a_index], inputs[input_b_index])
+
+    return inputs[0]
+
+
+if __name__ == '__main__':
+    with open('input.txt') as f:
+        inputs = [int(item) for item in f.read().rstrip().split(',')]
+
+    print(part1(inputs))