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# Problem Tags Rating Solved
1400-C Binary String Reconstruction
2-sat brute force constructive algorithms +1
1500
1400-B RPG Protagonist
brute force greedy math
1700
1400-A String Similarity
constructive algorithms strings
800
1399-F Yet Another Segments Subset
data structures dp graphs +1
2300
1399-E2 Weights Division (hard version)
binary search dfs and similar greedy +3
2200
1399-E1 Weights Division (easy version)
data structures dfs and similar greedy +1
2000
1399-D Binary String To Subsequences
constructive algorithms data structures greedy +1
1500
1399-C Boats Competition
brute force greedy two pointers
1200
1399-B Gifts Fixing
greedy
800
1399-A Remove Smallest
greedy sortings
800
1398-G Running Competition
bitmasks fft math +1
2600
1398-F Controversial Rounds
binary search data structures dp +2
2500
1398-E Two Types of Spells
binary search data structures greedy +3
2200
1398-D Colored Rectangles
dp greedy sortings
1800
1398-C Good Subarrays
data structures dp math
1600
1398-B Substring Removal Game
games greedy sortings
800
1398-A Bad Triangle
geometry math
800
1397-B Power Sequence
brute force math number theory +1
1500
1397-A Juggling Letters
greedy strings
800
1396-E Distance Matching
constructive algorithms dfs and similar trees
3200
1396-D Rainbow Rectangles
data structures sortings two pointers
3300
1396-C Monster Invaders
dp greedy implementation
2300
1396-B Stoned Game
brute force constructive algorithms games +1
1800
1396-A Multiples of Length
constructive algorithms greedy number theory
1600
1395-C Boboniu and Bit Operations
bitmasks brute force dp +1
1600
1395-B Boboniu Plays Chess
constructive algorithms
1100
1395-A Boboniu Likes to Color Balls
brute force math
1000
1394-E Boboniu and Banknote Collection
strings
3500
1394-D Boboniu and Jianghu
dp greedy sortings +1
2800
1394-C Boboniu and String
binary search geometry ternary search
2600
1394-B Boboniu Walks on Graph
brute force dfs and similar graphs +1
2300
1394-A Boboniu Chats with Du
dp greedy sortings +1
1800
1393-E2 Twilight and Ancient Scroll (harder version)
dp hashing implementation +3
3200
1393-E1 Twilight and Ancient Scroll (easier version)
dp hashing implementation +2
2800
1393-D Rarity and New Dress
dfs and similar dp implementation +1
2100
1393-C Pinkie Pie Eats Patty-cakes
constructive algorithms greedy math +1
1700
1393-B Applejack and Storages
constructive algorithms data structures greedy +1
1400
1393-A Rainbow Dash, Fluttershy and Chess Coloring
greedy math
800
1392-I Kevin and Grid
fft graphs math
3300
1392-H ZS Shuffles Cards
combinatorics dp math +1
3000
1392-G Omkar and Pies
bitmasks dfs and similar dp +2
2900
1392-F Omkar and Landslide
binary search constructive algorithms data structures +2
2400
1392-E Omkar and Duck
bitmasks constructive algorithms interactive +1
2100
1392-D Omkar and Bed Wars
dp greedy
1700
1392-C Omkar and Waterslide
greedy implementation
1200
1392-B Omkar and Infinity Clock
implementation math
800
1392-A Omkar and Password
greedy math
800
1391-E Pairs of Pairs
constructive algorithms dfs and similar graphs +2
2600
1391-D 505
bitmasks brute force constructive algorithms +3
2000
1391-C Cyclic Permutations
combinatorics dp graphs +1
1500