Do day 2.

d2.py

@@ -0,0 +1,66 @@
+import re
+
+
+GAME1 = """
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
+"""
+
+"""
+he bag contained only 12 red cubes, 13 green cubes, and 14 blue cubes?
+"""
+
+MAX = {
+    "red": 12,
+    "green": 13,
+    "blue": 14,
+}
+
+def solve(text):
+    r = re.compile(r"(\d+) (\w+)")
+    r2 = re.compile(r"Game (\d+):")
+    s = 0
+    for line in text.splitlines():
+        if line.strip() == "":
+            continue
+        id = r2.match(line).groups()[0]
+        m = r.findall(line)
+        for n, c in m:
+            if int(n) > MAX[c]:
+                break
+        else:
+            s += int(id)
+    return s
+
+def solve2(text):
+    r = re.compile(r"(\d+) (\w+)")
+    s = 0
+    for line in text.splitlines():
+        max = {
+            "red": 0,
+            "green": 0,
+            "blue": 0,
+        }
+        if line.strip() == "":
+            continue
+        m = r.findall(line)
+        for n, c in m:
+            n = int(n)
+            if n > max[c]:
+                max[c] = int(n)
+
+        s += (max["red"] * max["green"] * max["blue"])
+    return s
+
+if __name__ == "__main__":
+    assert(solve(GAME1) == 8)
+    assert(solve2(GAME1) == 2286)
+    
+    # 10:55
+    with open("i2.txt", 'r') as f:
+        text = f.read()
+        print(solve(text))
+        print(solve2(text))