Day 2

2 files changed, 34 insertions, 0 deletions

diff --git a/2019/2.in b/2019/2.in
new file mode 100644
index 0000000..e5ec5f7
--- /dev/null
+++ b/2019/2.in
@@ -0,0 +1 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,6,1,19,1,19,5,23,2,10,23,27,2,27,13,31,1,10,31,35,1,35,9,39,2,39,13,43,1,43,5,47,1,47,6,51,2,6,51,55,1,5,55,59,2,9,59,63,2,6,63,67,1,13,67,71,1,9,71,75,2,13,75,79,1,79,10,83,2,83,9,87,1,5,87,91,2,91,6,95,2,13,95,99,1,99,5,103,1,103,2,107,1,107,10,0,99,2,0,14,0
diff --git a/2019/2.py b/2019/2.py
new file mode 100755
index 0000000..9833888
--- /dev/null
+++ b/2019/2.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+import sys
+
+with open("2.in") as f:
+    arr = [int(x) for x in f.read().strip().split(",")]
+
+origarr = arr[:]
+
+def run(n,v):
+    arr = origarr[:]
+    arr[1] = n
+    arr[2] = v
+
+    i = 0
+    while arr[i] != 99:
+        C,a,b,c = arr[i:i+4]
+        if C == 1:
+            arr[c] = arr[a] + arr[b]
+        elif C == 2:
+            arr[c] = arr[a] * arr[b]
+        else:
+            assert False
+        i += 4
+
+    return arr[0]
+
+print(run(12,2))
+
+for n in range(100):
+    for v in range(100):
+        if run(n,v) == 19690720:
+            print(100 * n + v)
+            sys.exit(0)