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# Problem Tags Rating Solved
677-A Vanya and Fence
implementation
800
676-E The Last Fight Between Human and AI
math
2400
676-D Theseus and labyrinth
graphs implementation shortest paths
2000
676-C Vasya and String
binary search dp strings +1
1500
676-B Pyramid of Glasses
implementation math
1500
676-A Nicholas and Permutation
constructive algorithms implementation
800
675-E Trains and Statistic
data structures dp greedy
2300
675-D Tree Construction
data structures trees
1800
675-C Money Transfers
constructive algorithms data structures greedy +1
2100
675-B Restoring Painting
brute force constructive algorithms math
1400
675-A Infinite Sequence
math
1100
673-B Problems for Round
greedy implementation
1300
673-A Bear and Game
implementation
800
672-B Different is Good
constructive algorithms implementation strings
1000
672-A Summer Camp
implementation
800
671-E Organizing a Race
data structures greedy
3300
671-D Roads in Yusland
data structures dp greedy
2900
671-C Ultimate Weirdness of an Array
data structures number theory
2800
671-B Robin Hood
binary search greedy
2000
671-A Recycling Bottles
dp geometry greedy +1
1800
670-F Restore a Number
brute force constructive algorithms strings
2300
670-E Correct Bracket Sequence Editor
data structures dsu strings
1700
670-D2 Magic Powder - 2
binary search implementation
1500
670-D1 Magic Powder - 1
binary search brute force implementation
1400
670-C Cinema
implementation sortings
1300
670-B Game of Robots
implementation
1000
670-A Holidays
brute force constructive algorithms greedy +1
900
669-A Little Artem and Presents
math
800
667-B Coat of Anticubism
constructive algorithms geometry
1100
667-A Pouring Rain
geometry math
1100
666-E Forensic Examination
data structures string suffix structures
3100
666-D Chain Reaction
brute force geometry
3000
666-C Codeword
combinatorics strings
2500
666-B World Tour
graphs shortest paths
2000
666-A Reberland Linguistics
dp implementation strings
1800
665-F Four Divisors
data structures dp math +3
2400
665-E Beautiful Subarrays
data structures divide and conquer strings +1
2100
665-D Simple Subset
constructive algorithms greedy number theory
1800
665-C Simple Strings
dp greedy strings
1300
665-B Shopping
brute force
1400
665-A Buses Between Cities
implementation
1600
664-A Complicated GCD
math number theory
800
663-A Rebus
constructive algorithms expression parsing greedy +1
1800
662-E To Hack or not to Hack
brute force dp greedy
3100
662-D International Olympiad
constructive algorithms greedy implementation +1
2000
662-C Binary Table
bitmasks brute force divide and conquer +3
2600
662-B Graph Coloring
dfs and similar graphs
2200
662-A Gambling Nim
bitmasks math matrices +1
2400
661-H Rotate Matrix
*special
2400
661-G Hungarian Notation
*special
2200