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# Problem Tags Rating Solved
2043-A Coin Transformation
brute force math
800
2042-F Two Subarrays
data structures dp implementation +1
2600
2042-E Vertex Pairs
binary search brute force data structures +5
2900
2042-D Recommendations
data structures implementation sortings +1
1900
2042-C Competitive Fishing
greedy
1800
2042-B Game with Colored Marbles
games greedy
900
2042-A Greedy Monocarp
greedy sortings
800
2041-N Railway Construction
3300
2041-M Selection Sort
binary search data structures greedy +1
2000
2041-L Building Castle
2900
2041-K Trophic Balance Species
binary search brute force dfs and similar +1
3100
2041-J Bottle Arrangement
data structures divide and conquer dp +2
2700
2041-I Auto Complete
binary search data structures hashing +4
2300
2041-H Sheet Music
combinatorics dp math
2300
2041-G Grid Game
3100
2041-F Segmentation Folds
brute force dfs and similar number theory
2400
2041-E Beautiful Array
constructive algorithms math
1200
2041-D Drunken Maze
brute force dfs and similar graphs +1
1700
2041-C Cube
bitmasks dfs and similar dp
2000
2041-B Bowling Frame
binary search brute force math
1200
2041-A The Bento Box Adventure
implementation sortings
1300
2040-F Number of Cubes
combinatorics dp math +1
2700
2040-E Control of Randomness
combinatorics dfs and similar dp +5
2100
2040-D Non Prime Tree
brute force constructive algorithms dfs and similar +4
1900
2040-C Ordered Permutations
bitmasks combinatorics constructive algorithms +3
1600
2040-B Paint a Strip
constructive algorithms greedy math
1000
2040-A Game of Division
games math
800
2039-H2 Cool Swap Walk (Hard Version)
constructive algorithms implementation sortings
3500
2039-H1 Cool Swap Walk (Easy Version)
constructive algorithms implementation sortings
3500
2039-G Shohag Loves Pebae
math number theory
3500
2039-F2 Shohag Loves Counting (Hard Version)
dp number theory
3200
2039-F1 Shohag Loves Counting (Easy Version)
combinatorics dp math +1
2800
2039-E Shohag Loves Inversions
combinatorics dp implementation +1
2200
2039-D Shohag Loves GCD
constructive algorithms greedy math +1
1700
2039-C2 Shohag Loves XOR (Hard Version)
bitmasks brute force math +1
1800
2039-C1 Shohag Loves XOR (Easy Version)
bitmasks brute force math +1
1200
2039-B Shohag Loves Strings
constructive algorithms greedy implementation +1
1000
2039-A Shohag Loves Mod
constructive algorithms number theory
800
2038-N Fixing the Expression
implementation
800
2038-M Royal Flush
dp implementation
2800
2038-L Bridge Renovation
brute force dp greedy +2
1400
2038-K Grid Walk
brute force dp greedy +2
2100
2038-J Waiting for...
greedy implementation
800
2038-I Polyathlon
binary search data structures hashing +2
2500
2038-H Galactic Council
flows
3000
2038-G Guess One Character
constructive algorithms implementation interactive
1900
2038-F Alternative Platforms
combinatorics data structures fft +2
2500
2038-E Barrels
data structures greedy math
2900
2038-D Divide OR Conquer
binary search bitmasks data structures +2
2400
2038-C DIY
data structures geometry greedy +1
1400