add day 18

18/1.py

@@ -0,0 +1,29 @@
+with open("input") as f:
+    content = [x.strip().replace(")", " )").replace("(", "( ").split(" ") for x in f]
+
+def evaluate(expression, startpos):
+    result = 0
+    operator = "+"
+    number = 0
+    i = startpos
+    while i < len(expression):
+        number = None
+        if expression[i] == "(":
+            number, i = evaluate(expression, i + 1)
+        elif expression[i] == ")":
+            return result, i
+        elif expression[i] in ["*", "+"]:
+            operator = expression[i]
+        else:
+            number = int(expression[i])
+
+        if number is not None:
+            if operator == "*":
+                result *= number
+            elif operator == "+":
+                result += number
+        i += 1
+
+    return result
+
+print(sum(map(lambda x: evaluate(x, 0), content)))

18/2.py

@@ -0,0 +1,34 @@
+with open("input") as f:
+    content = [x.strip().replace(")", " )").replace("(", "( ").split(" ") for x in f]
+
+def evaluate(expression, startpos):
+    result = 0
+    number = 0
+    i = startpos
+    expression2 = []
+    endpos = startpos
+    while i < len(expression):
+        number = None
+        if expression[i] == "(":
+            number, i = evaluate(expression, i + 1)
+        elif expression[i] == ")":
+            endpos = i
+            break
+        elif expression[i] == "*":
+            expression2.append(result)
+            result = 0
+        elif expression[i] != "+":
+            number = int(expression[i])
+
+        if number is not None:
+            result += number
+        i += 1
+
+    expression2.append(result)
+    result = 1
+    for e in expression2:
+        result *= e
+
+    return result, endpos
+
+print(sum(map(lambda x: evaluate(x, 0)[0], content)))

18/input

@@ -0,0 +1,380 @@
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