Credits and licenses
The list of problems you add from is built from two open source projects. Problem titles belong to LeetCode. leetty is not affiliated with LeetCode or NeetCode.
doocs/leetcode
Problem titles, difficulty and tags come from doocs/leetcode by the doocs contributors, licensed under CC BY-SA 4.0.
Changes: SQL, shell, concurrency, JavaScript and Pandas problems are removed, tags are mapped to 19 topics, and problem statements are not included. The resulting catalog is licensed under CC BY-SA 4.0 as well.
neetcode-gh/leetcode
Problem categories and the Blind 75 and NeetCode 150 lists come from neetcode-gh/leetcode, licensed under the MIT License:
MIT License
Copyright (c) 2022 neetcode-gh
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
VT323 font
Copyright 2011, The VT323 Project Authors. Licensed under the SIL Open Font License 1.1.