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13. Roman to Integer Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000For example, two is written as II in Roman numeral, just two one's added together. Twelve is written as, XII, which is simply X + II. The number twenty seven is written as XXVII, which is XX + V + II.Roman numerals are usually written largest to smallest from left to.. 2019. 1. 12.
Two pointer approach (11. Container with most water) Q. Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line iis at (i, ai) and (i, 0). Find two lines, which together with x-axis forms a container, such that the container contains the most water.Note: You may not slant the container and n is at least 2.Example:Input: [1,8,6,2,5,4,8,3,7] O.. 2019. 1. 11.
Python in operator (Regular Expression Matching) Nowadays I really focus on preparing coding interview. I am going to briefly summarize and post what I learn and study. text = "aa" pattern = "a" # Whether pattern is null or not # if it is null return False if not pattern: return not text # Input text is not null # Pattern has the same character or '.' first_match = bool(text) and pattern[0] in {text[0], '.'} if len(pattern) >= 2 and pattern[1].. 2019. 1. 10.
What does if __name__ == “__main__”: do? 궁금해서 찾아보았는데 과제하는데 도움이 될 것 같아서 공부삼아 기록한다. When your script is run by passing it as a command to the Python interpreter, python myscript.py all of the code that is at indentation level 0 gets executed. Functions and classes that are defined are, well, defined, but none of their code gets run. Unlike other languages, there's no main() function that gets run automatically - the main() function is im.. 2018. 9. 15.
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