文件: root - text - article - 2019 - 10 - create-a-simple-calculator.txt
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标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, | 英文 | 主页 | 类别: 计算机科学 | 484 次阅读, 22485 次搜索 | 61 个单词
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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:
标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, | 英文 | 主页 | 类别: 计算机科学 | 484 次阅读, 22485 次搜索 | 61 个单词 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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