Added some more one-liner solutions
-rw-r--r-- 384 .gitignore
drwxr-xr-x - 00-holiday-specs
drwxr-xr-x - 01-ticket-prices
drwxr-xr-x - 02-lifts
drwxr-xr-x - 03-door-codes
drwxr-xr-x - 04-word-search
drwxr-xr-x - 05-display-board
drwxr-xr-x - 06-tour-shapes
drwxr-xr-x - 09-word-chains
-rw-r--r-- 1616 m269-skills.ipynb
drwxr-xr-x - monotone-substrings
-rw-r--r-- 45 ou-programming-quiz.sublime-project
-rw-r--r-- 9706 problem-ideas.ipynb