2022 - 2023 - Class 19

This week we went over Regular Expressions (RegEx)

The solution to Last Week's HW problem:

n = int(input())
blue, red = int(input()),int(input())
with_replace = False
if n is not 1:
    with_replace = input()=='N'
num,dem = 1,1
for i in range(n):
    if input()=='B':
        num*=blue
        dem*=(blue+red)
        if with_replace:
            blue-=1
    else:
        num*=red
        dem*=(blue+red)
        if with_replace:
            red-=1
print(f'{num}/{dem}')

The solution to "Capturing & Non-Capturing Groups" in Hackerrank:

Regex_Pattern=r'(ok){3,}'
import re 
print(str(bool(re.search(Regex_Pattern, input()))).lower())