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Leetcode Çözümleri - Evaluate Reverse Polish Notation

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LeetCode içerisinde bulunan "Evaluate Reverse Polish Notation" sorusunun açıklaması ve çözümü. Bu soruda size verilen bir "reverse polish notation"'ın sonucunu geriye döndürmeniz isteniyor.
#leetcode #amazon #interview
00:00 | Giriş
00:10 | Reverse Polish Notation kavramı
00:34 | Sorunun açıklaması
02:54 | Whiteboard'ta çözümün açıklanması
06:05 | Çözümün kodlanması
➡️ Problem açıklaması:
Evaluate the value of an arithmetic expression in Reverse Polish Notation.
Valid operators are +, -, *, and /. Each operand may be an integer or another expression.
Note that division between two integers should truncate toward zero.
It is guaranteed that the given RPN expression is always valid. That means the expression would always evaluate to a result, and there will not be any division by zero operation.
Example 1:
Input: tokens = ["2","1","+","3","*"]
Output: 9
Explanation: ((2 + 1) * 3) = 9
Example 2:
Input: tokens = ["4","13","5","/","+"]
Output: 6
Explanation: (4 + (13 / 5)) = 6
Example 3:
Input: tokens = ["10","6","9","3","+","-11","*","/","*","17","+","5","+"]
Output: 22
Explanation: ((10 * (6 / ((9 + 3) * -11))) + 17) + 5
= ((10 * (6 / (12 * -11))) + 17) + 5
= ((10 * (6 / -132)) + 17) + 5
= ((10 * 0) + 17) + 5
= (0 + 17) + 5
= 17 + 5
= 22
Constraints:
tokens[i] is either an operator: "+", "-", "*", or "/", or an integer in the range [-200, 200].
***
Sosyal Medya
Destek
#leetcode #amazon #interview
00:00 | Giriş
00:10 | Reverse Polish Notation kavramı
00:34 | Sorunun açıklaması
02:54 | Whiteboard'ta çözümün açıklanması
06:05 | Çözümün kodlanması
➡️ Problem açıklaması:
Evaluate the value of an arithmetic expression in Reverse Polish Notation.
Valid operators are +, -, *, and /. Each operand may be an integer or another expression.
Note that division between two integers should truncate toward zero.
It is guaranteed that the given RPN expression is always valid. That means the expression would always evaluate to a result, and there will not be any division by zero operation.
Example 1:
Input: tokens = ["2","1","+","3","*"]
Output: 9
Explanation: ((2 + 1) * 3) = 9
Example 2:
Input: tokens = ["4","13","5","/","+"]
Output: 6
Explanation: (4 + (13 / 5)) = 6
Example 3:
Input: tokens = ["10","6","9","3","+","-11","*","/","*","17","+","5","+"]
Output: 22
Explanation: ((10 * (6 / ((9 + 3) * -11))) + 17) + 5
= ((10 * (6 / (12 * -11))) + 17) + 5
= ((10 * (6 / -132)) + 17) + 5
= ((10 * 0) + 17) + 5
= (0 + 17) + 5
= 17 + 5
= 22
Constraints:
tokens[i] is either an operator: "+", "-", "*", or "/", or an integer in the range [-200, 200].
***
Sosyal Medya
Destek
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