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# Problem Tags Rating Solved
847-A Union of Doubly Linked Lists
implementation
1500
846-F Random Query
data structures math probabilities +1
1800
846-E Chemistry in Berland
dfs and similar greedy trees
2300
846-D Monitor
binary search data structures
1900
846-C Four Segments
brute force data structures dp
1800
846-B Math Show
brute force greedy
1800
846-A Curriculum Vitae
brute force implementation
1500
845-G Shortest Path Problem?
dfs and similar graphs math
2300
845-F Guards In The Storehouse
bitmasks dp
2500
845-E Fire in the City
binary search data structures
2400
845-D Driving Test
data structures dp greedy
1800
845-C Two TVs
data structures greedy sortings
1500
845-B Luba And The Ticket
brute force greedy implementation
1600
845-A Chess Tourney
implementation sortings
1100
844-B Rectangles
combinatorics math
1300
844-A Diversity
greedy implementation strings
1000
843-E Maximum Flow
flows graphs
3000
843-D Dynamic Shortest Path
graphs shortest paths
3400
843-C Upgrading Tree
constructive algorithms dfs and similar graphs +2
2600
843-B Interactive LowerBound
brute force interactive probabilities
2000
843-A Sorting by Subsequences
dfs and similar dsu implementation +2
1400
842-E Nikita and game
binary search dfs and similar divide and conquer +2
2800
842-D Vitya and Strange Lesson
binary search data structures
2000
842-C Ilya And The Tree
dfs and similar graphs math +2
2000
842-B Gleb And Pizza
geometry
1100
842-A Kirill And The Game
brute force two pointers
1200
841-B Godsend
games math
1100
841-A Generous Kefa
brute force implementation
900
840-E In a Trap
trees
3200
840-D Destiny
data structures probabilities
2500
840-C On the Bench
combinatorics dp
2500
840-B Leha and another game about graph
constructive algorithms data structures dfs and similar +2
2100
840-A Leha and Function
combinatorics greedy math +2
1300
839-E Mother of Dragons
brute force graphs math +1
2700
839-D Winter is here
combinatorics dp math +1
2200
839-C Journey
dfs and similar dp graphs +2
1500
839-B Game of the Rows
brute force greedy implementation
1900
839-A Arya and Bran
implementation
900
838-F Expected Earnings
2800
838-E Convex Countour
dp
2300
838-D Airplane Arrangements
math number theory
2700
838-C Future Failure
dp games
2800
838-B Diverging Directions
data structures dfs and similar trees
2100
838-A Binary Blocks
brute force
1400
837-G Functions On The Segments
data structures
2500
837-F Prefix Sums
binary search brute force combinatorics +2
2400
837-E Vasya's Function
binary search implementation math
2100
837-D Round Subset
dp math
2100
837-C Two Seals
brute force implementation
1500
837-B Flag of Berland
brute force implementation
1600