From 53a54b5c6bf63a5872bc71e9d16361d2cc3d42b8 Mon Sep 17 00:00:00 2001
From: Pavel Karateev <lancelote.du.lac@gmail.com>
Date: Sun, 20 Oct 2024 16:36:39 +0200
Subject: [PATCH] re-solve "150. Evaluate Reverse Polish Notation"

---
 .plan                                   |  4 ++++
 src/evaluate_reverse_polish_notation.py | 23 ++++++++++++-----------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/.plan b/.plan
index 40fc00f..24f573d 100644
--- a/.plan
+++ b/.plan
@@ -4,6 +4,10 @@ solve all "stack" questions in top-150
 complete top interview 150
 solve each available question at least once
 
+Oct 20, 2024
+
+* re-solve "150. Evaluate Reverse Polish Notation"
+
 Oct 19, 2024
 
 * re-solve "155. Min Stack"
diff --git a/src/evaluate_reverse_polish_notation.py b/src/evaluate_reverse_polish_notation.py
index c5a2512..716ddd6 100644
--- a/src/evaluate_reverse_polish_notation.py
+++ b/src/evaluate_reverse_polish_notation.py
@@ -9,15 +9,16 @@ def evalRPN(self, tokens: list[str]) -> int:
                 b = stack.pop()
                 a = stack.pop()
 
-                if token == "+":
-                    stack.append(a + b)
-                elif token == "-":
-                    stack.append(a - b)
-                elif token == "*":
-                    stack.append(a * b)
-                elif token == "/":
-                    stack.append(int(a / b))
-                else:
-                    raise ValueError(f"unknown token: {token}")
+                match token:
+                    case "+":
+                        stack.append(a + b)
+                    case "-":
+                        stack.append(a - b)
+                    case "*":
+                        stack.append(a * b)
+                    case "/":
+                        stack.append(int(a / b))
+                    case _:
+                        raise ValueError(f"unknown token: {token}")
 
-        return stack[-1]
+        return stack[0]