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# Problem Tags Rating Solved
1628-E Groceries in Meteor Town
binary search data structures dsu +1
3100
1628-D2 Game on Sum (Hard Version)
combinatorics dp games +1
2400
1628-D1 Game on Sum (Easy Version)
combinatorics dp games +1
2100
1628-C Grid Xor
constructive algorithms greedy implementation +2
2300
1628-B Peculiar Movie Preferences
greedy strings
1700
1628-A Meximum Array
binary search constructive algorithms greedy +3
1400
1627-F Not Splitting
geometry graphs greedy +2
2700
1627-E Not Escaping
data structures dp implementation +2
2200
1627-D Not Adding
brute force dp math +1
1900
1627-C Not Assigning
constructive algorithms dfs and similar number theory +1
1400
1627-B Not Sitting
games greedy sortings
1300
1627-A Not Shading
constructive algorithms implementation
800
1626-F A Random Code Problem
combinatorics dp math +2
2800
1626-E Black and White Tree
dfs and similar greedy trees
2400
1626-D Martial Arts Tournament
binary search brute force greedy +1
2100
1626-C Monsters And Spells
binary search data structures dp +4
1700
1626-B Minor Reduction
greedy strings
1100
1626-A Equidistant Letters
constructive algorithms sortings
800
1625-E2 Cats on the Upgrade (hard version)
binary search data structures dfs and similar +2
2800
1625-E1 Cats on the Upgrade (easy version)
brute force data structures dfs and similar +4
2500
1625-D Binary Spiders
bitmasks data structures implementation +3
2300
1625-C Road Optimization
dp
1700
1625-B Elementary Particles
brute force greedy sortings
1100
1625-A Ancient Civilization
bitmasks greedy math
800
1624-G MinOr Tree
bitmasks dfs and similar dsu +2
1900
1624-F Interacdive Problem
binary search constructive algorithms interactive
2000
1624-E Masha-forgetful
brute force constructive algorithms dp +3
2000
1624-D Palindromes Coloring
binary search greedy sortings +1
1400
1624-C Division by Two and Permutation
constructive algorithms flows graph matchings +2
1100
1624-B Make AP
implementation math
900
1624-A Plus One on the Subset
math
800
1623-E Middle Duplication
data structures dfs and similar greedy +2
2500
1623-D Robot Cleaner Revisit
implementation math probabilities
2300
1623-C Balanced Stone Heaps
binary search greedy
1600
1623-B Game on Ranges
brute force dfs and similar implementation +1
1100
1623-A Robot Cleaner
brute force implementation math
800
1622-F Quadratic Set
constructive algorithms hashing math +1
2900
1622-E Math Test
bitmasks brute force greedy
2200
1622-D Shuffle
combinatorics math two pointers
2000
1622-C Set or Decrease
binary search brute force greedy +1
1600
1622-B Berland Music
data structures greedy math +1
1000
1622-A Construct a Rectangle
geometry math
800
1621-I Two Sequences
data structures hashing string suffix structures
3500
1621-H Trains and Airplanes
dfs and similar graphs shortest paths +1
3500
1621-G Weighted Increasing Subsequences
data structures dp math
3200
1621-F Strange Instructions
data structures greedy implementation
2700
1621-E New School
binary search data structures dp +3
2300
1621-D The Winter Hike
constructive algorithms greedy math
2100
1621-C Hidden Permutations
dfs and similar interactive math
1700
1621-B Integers Shop
data structures greedy implementation
1500