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# Problem Tags Rating Solved
1934-D1 XOR Break --- Solo Version
bitmasks constructive algorithms greedy
2100
1934-C Find a Mine
binary search constructive algorithms geometry +3
1700
1934-B Yet Another Coin Problem
brute force dp greedy +1
1200
1934-A Too Min Too Max
greedy math
800
1933-G Turtle Magic: Royal Turtle Shell Pattern
bitmasks brute force combinatorics +3
2300
1933-F Turtle Mission: Robot and the Earthquake
dfs and similar dp graphs +1
2100
1933-E Turtle vs. Rabbit Race: Optimal Trainings
binary search implementation math +1
1500
1933-D Turtle Tenacity: Continual Mods
constructive algorithms greedy math +2
1200
1933-C Turtle Fingers: Count the Values of k
brute force implementation math +1
1100
1933-B Turtle Math: Fast Three Task
implementation math number theory
800
1933-A Turtle Puzzle: Rearrange and Negate
greedy math sortings
800
1932-G Moving Platforms
graphs math number theory +1
2300
1932-F Feed Cats
data structures dp sortings
1900
1932-E Final Countdown
implementation math number theory
1600
1932-D Card Game
greedy implementation
1400
1932-C LR-remainders
brute force data structures implementation +2
1400
1932-B Chaya Calendar
number theory
1100
1932-A Thorns and Coins
dp greedy implementation
800
1931-G One-Dimensional Puzzle
combinatorics math number theory
2000
1931-F Chat Screenshots
combinatorics dfs and similar graphs
1700
1931-E Anna and the Valentine's Day Gift
games greedy math +1
1400
1931-D Divisible Pairs
combinatorics math number theory
1300
1931-C Make Equal Again
brute force greedy math
1000
1931-B Make Equal
greedy
800
1931-A Recovering a Small String
brute force strings
800
1930-I Counting Is Fun
combinatorics
3500
1930-H Interactive Mex Tree
constructive algorithms dfs and similar interactive +1
3300
1930-G Prefix Max Set Counting
data structures dp trees
3100
1930-F Maximize the Difference
bitmasks brute force dfs and similar
2700
1930-E 2..3...4.... Wonderful! Wonderful!
combinatorics dp math
2400
1930-D2 Sum over all Substrings (Hard Version)
bitmasks divide and conquer dp +4
2100
1930-D1 Sum over all Substrings (Easy Version)
brute force dp greedy +1
1800
1930-C Lexicographically Largest
binary search constructive algorithms data structures +2
1700
1930-B Permutation Printing
brute force constructive algorithms math
1000
1930-A Maximise The Score
greedy sortings
800
1929-F Sasha and the Wedding Binary Search Tree
brute force combinatorics data structures +3
2300
1929-E Sasha and the Happy Tree Cutting
bitmasks brute force dfs and similar +5
2300
1929-D Sasha and a Walk in the City
combinatorics dp math +1
1900
1929-C Sasha and the Casino
binary search brute force constructive algorithms +3
1400
1929-B Sasha and the Drawing
constructive algorithms greedy math
800
1929-A Sasha and the Beautiful Array
constructive algorithms greedy math +1
800
1928-F Digital Patterns
combinatorics data structures implementation +1
2900
1928-E Modular Sequence
brute force constructive algorithms dp +4
2300
1928-D Lonely Mountain Dungeons
brute force data structures greedy +2
1900
1928-C Physical Education Lesson
brute force math number theory
1600
1928-B Equalize
binary search greedy sortings +1
1200
1928-A Rectangle Cutting
geometry math
800
1927-G Paint Charges
data structures dp greedy +1
2300
1927-F Microcycle
data structures dfs and similar dsu +5
1900
1927-E Klever Permutation
constructive algorithms math two pointers
1400