File: root - text - article - 2019 - 10 - create-a-simple-calculator.txt
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, | English | Home Page | Category: Computing | 545 Views, 22925 Search Bots | 61 Words
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Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, | English | Home Page | Category: Computing | 545 Views, 22925 Search Bots | 61 Words
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Hi, here's your problem today. This problem was recently asked by Google:
Given a mathematical expression with just single digits, plus signs, negative signs, and brackets, evaluate the expression. Assume the expression is properly formed.
Example:
Input: - ( 3 + ( 2 - 1 ) )
Output: -4
Here's the function signature:
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, | English | Home Page | Cateogry: Computing | 545 Views, 22925 Search Bots | 61 Words Given a mathematical expression with just single digits, plus signs, negative signs, and brackets, evaluate the expression. Assume the expression is properly formed.
Example:
Input: - ( 3 + ( 2 - 1 ) )
Output: -4
Here's the function signature:
def eval(expression):
# Fill this in.
print eval('- (3 + ( 2 - 1 ) )')
# -4
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