Good mood and pure thoughts to everyone who comes here.
1422A - Fence
Author aropan
Solution 94875319
Tutorial
1422B - Nice Matrix
Author andrew
Solution 94875245
Tutorial
1422C - Bargain
Author aropan
Solution 94875502
Tutorial
1422D - Returning Home
Author aropan
Solution 94875536
Tutorial
1422E - Minlexes
Author aropan
Solution 94875558
Tutorial
1422F - Boring Queries
Author andrew
Solution 94875580, author's solution with persistent segment tree 94875295
Tutorial