subtree(users/wpcarro): docking briefcase at '24f5a642' r/3226

git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c09813172c79820bcf526bb10cf4208
git-subtree-split: 24f5a642af3aa1627bbff977f0a101907a02c69f
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789

1 files changed, 32 insertions, 0 deletions

diff --git a/users/wpcarro/scratch/advent-of-code-2019/day_2.py b/users/wpcarro/scratch/advent-of-code-2019/day_2.py
new file mode 100644
index 000000000000..77774c1bb5ad
--- /dev/null
+++ b/users/wpcarro/scratch/advent-of-code-2019/day_2.py
@@ -0,0 +1,32 @@
+from itertools import product
+
+x = [
+    1, 0, 0, 3, 1, 1, 2, 3, 1, 3, 4, 3, 1, 5, 0, 3, 2, 1, 10, 19, 1, 6, 19, 23,
+    2, 23, 6, 27, 2, 6, 27, 31, 2, 13, 31, 35, 1, 10, 35, 39, 2, 39, 13, 43, 1,
+    43, 13, 47, 1, 6, 47, 51, 1, 10, 51, 55, 2, 55, 6, 59, 1, 5, 59, 63, 2, 9,
+    63, 67, 1, 6, 67, 71, 2, 9, 71, 75, 1, 6, 75, 79, 2, 79, 13, 83, 1, 83, 10,
+    87, 1, 13, 87, 91, 1, 91, 10, 95, 2, 9, 95, 99, 1, 5, 99, 103, 2, 10, 103,
+    107, 1, 107, 2, 111, 1, 111, 5, 0, 99, 2, 14, 0, 0
+]
+
+
+def interpret(i, x):
+    op, a, b, out = x[i + 0], x[i + 1], x[i + 2], x[i + 3]
+    if op == 1:
+        x[out] = x[a] + x[b]
+        return interpret(i + 4, x)
+    elif op == 2:
+        x[out] = x[a] * x[b]
+        return interpret(i + 4, x)
+    elif op == 99:
+        return x
+    else:
+        raise Exception('Unsupported opcode: {}. {}, {}'.format(op, a, b))
+
+
+for a, b in product(range(100), range(100)):
+    y = x[:]
+    y[1] = a
+    y[2] = b
+    if interpret(0, y)[0] == 19690720:
+        print(100 * a + b)