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유튜브 문제 풀이: https://youtu.be/rntT16XgqRc 파이썬소스: http://bit.ly/3WHqBmr GitHub - skysign/WSAPT: 알고리즘 문제 풀이 알고리즘 문제 풀이. Contribute to skysign/WSAPT development by creating an account on GitHub. github.com

hackerrank.com Athlete Sort Problem Link : https://www.hackerrank.com/challenges/python-sort-sort/problem Difficulty : Medium Tip Using itemgetter() as key for sorted() function, is important to solve Solution #!/bin/python3 import math import os import random import re import sys from operator import itemgetter mn = input().split() m = int(mn[0]) n = int(mn[1]) arr = [] for _ in range(m): arr.a..

hackerrank.com Validating Postal Codes Problem Link : https://www.hackerrank.com/challenges/validating-postalcode/problem Difficulty : Hard Tip 100000~999999 [1-9]{1}[0-9]{5}$

hackerrank.com Matrix Script Problem Link : https://www.hackerrank.com/challenges/matrix-script/problem Difficulty : Hard Tip MUST remove __main__, it lead to fail even correct answer, because there is 'if' Should use regular expression Lookahead and lookbehind Write regular expression, to capture [alphabet][symboles][alphabet] Solution #!/bin/python3 import math import os import random import r..

hackerrank.com ginortS Problem Link : https://www.hackerrank.com/challenges/ginorts/problem Difficulty : Medium Tip We should sort as per four groups myfilter() function is written to get four gourps. Sort each groups and concate them Solution s = input() def myfilter(s): lc = [] wc = [] on = [] en = [] for i in range(len(s)): c = s[i] if 'a'

hackerrank.com Validating Credit Card Numbers Problem Link : https://www.hackerrank.com/challenges/validating-credit-card-number/problem Difficulty : Medium Tip It's a bit difficult to solve only using regular expression Especially, 'NOT have or more consecutive repeated digits' More over, in test case 6, '-------' is given as a part of input, it should be filtered, also Check condition 1~4 by u..

hackerrank.com Linear Algebra Problem Link : https://www.hackerrank.com/challenges/np-linear-algebra/problem Difficulty : Easy Tip Use numpy.linalg.det() np.set_printoptions(legacy='1.13') Checking answer is using old style, please set 1.13 Solution import numpy as np N = int(input()) m = np.array([input().split() for _ in range(N)], float) np.set_printoptions(legacy='1.13') print(np.linalg.det(..

hackerrank.com Polynomials Problem Link : https://www.hackerrank.com/challenges/np-polynomials/problem Difficulty : Easy Tip polyval() should be used to solve problem Solution import numpy as np print(np.polyval(list(map(float,input().split())), float(input())))