I'm currently live discussion the problems.
I will add problemwise timestamp after the discussion stream.
You can join in if something in this blog is unclear or there are more questions.
Idea
My submission — 276111053
Idea
My submission — 276114559
2000C - Numeric String Template
Hint 0
Hint 1
Hint 2
My submission — 276126482
Hint 1
Hint 2
Hint 3
My submission — 276137058
2000E - Photoshoot for Gorillas
Hint 1
Hint 2
My submission — 276261729
2000F - Color Rows and Columns
Hint 1
Hint 2
2000G - Call During the Journey
Hint 1
Hint 2
Hint 3
My submission — 276211659
2000H - Ksyusha and the Loaded Set
Hint 1
Hint 2
Hint 2
My submission — 276196913
lightening fast!
FYI no need to binary search on G, just do Dijkstra from $$$n$$$ to 1 instead of from 1 to $$$n$$$: 276180691
great