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Name
2257C
Spying on the Beaver
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1200
x10841
2254D
Silhouette
constructive algorithms
,
math
,
sortings
1300
x9992
2248D
Good Pair Queries
constructive algorithms
,
greedy
,
math
1400
x7007
2245C
MEXOR
bitmasks
,
constructive algorithms
,
math
1400
x6894
2244D
Yaroslav and Productivity
constructive algorithms
,
dp
,
greedy
,
math
,
number theory
1200
x13196
2239A
Nim Game Is XOR Game
constructive algorithms
,
games
,
greedy
,
math
1300
x9382
2237D
Fullmetal Bitchemist
constructive algorithms
,
greedy
,
math
1500
x6532
2236D
Brand New Tatar TV Show
binary search
,
constructive algorithms
,
dp
,
games
,
games
,
math
1300
x13117
2230C
Arrange the Numbers in a Circle
constructive algorithms
,
implementation
,
math
1300
x11861
2229C2
We Be Flipping (Hard Version)
constructive algorithms
,
dp
,
greedy
1400
x8907
2227D
Palindromex
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
two pointers
1200
x14629
2224B
Zhily and Mex and Max
constructive algorithms
,
greedy
,
math
,
sortings
1200
x9478
2223A
Zhily and Bracket Swapping
constructive algorithms
,
greedy
1300
x8225
2219A
Grid L
brute force
,
constructive algorithms
,
math
,
number theory
1400
x11092
2218F
The 67th Tree Problem
constructive algorithms
,
implementation
,
trees
1500
x9370
2209C
Find the Zero
constructive algorithms
,
interactive
1400
x12089
2204D
Alternating Path
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
graphs
,
graphs
,
graphs
1400
x10277
2199C
Minesweeper
*special problem
,
constructive algorithms
,
greedy
1600
x565
2194D
Table Cut
constructive algorithms
,
greedy
,
implementation
1600
x8851
2190B1
Sub-RBS (Easy Version)
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
strings
,
two pointers
1400
x11719
2190A
Sorting Game
constructive algorithms
,
games
,
greedy
1200
x18551
2189C1
XOR Convenience (Easy Version)
bitmasks
,
constructive algorithms
,
math
1300
x14909
2189B
The Curse of the Frog
constructive algorithms
,
greedy
,
math
1200
x16480
2183D1
Tree Coloring (Easy Version)
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x9492
2179D
Blackslex and Penguin Civilization
bitmasks
,
constructive algorithms
,
greedy
,
math
1300
x14311
2175B
XOR Array
constructive algorithms
,
math
1300
x13211
2173C
Kanade's Perfect Multiples
brute force
,
constructive algorithms
,
greedy
,
number theory
1400
x13409
2171F
Rae Taylor and Trees (hard version)
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1600
x7779
2165A
Cyclic Merging
constructive algorithms
,
greedy
1300
x16834
2162E
Beautiful Palindromes
constructive algorithms
,
greedy
,
schedules
1600
x9931
2161C
Loyalty
constructive algorithms
,
greedy
,
sortings
,
two pointers
1200
x13538
2158B
Split
constructive algorithms
,
greedy
,
math
1200
x14948
2157C
Meximum Array 2
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11766
2153C
Symmetrical Polygons
constructive algorithms
,
geometry
,
greedy
,
implementation
,
sortings
1500
x12467
2147C
Rabbits
constructive algorithms
,
dp
,
greedy
,
implementation
1500
x12252
2146D1
Max Sum OR (Easy Version)
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
trees
1500
x11335
2146C
Wrong Binary Search
binary search
,
constructive algorithms
1300
x14141
2143C
Max Tree
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1300
x15127
2137D
Replace with Occurrences
constructive algorithms
1200
x20609
2134B
Add 0 or K
constructive algorithms
,
math
,
number theory
1200
x22148
2129A
Double Perspective
constructive algorithms
,
dp
,
dsu
,
graphs
,
greedy
,
sortings
1300
x19158
2124C
Subset Multiplication
constructive algorithms
,
greedy
,
math
,
number theory
1300
x17273
2123D
Binary String Battle
constructive algorithms
,
games
,
greedy
1200
x22747
2120C
Divine Tree
constructive algorithms
,
greedy
,
math
,
sortings
,
trees
1400
x13097
2119C
A Good Problem
bitmasks
,
constructive algorithms
,
math
1300
x16943
2118B
Make It Permutation
constructive algorithms
1200
x20577
2115A
Gellyfish and Flaming Peony
constructive algorithms
,
dp
,
math
,
number theory
1500
x17510
2113B
Good Start
constructive algorithms
,
math
1200
x15129
2111D
Creating a Schedule
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1400
x12454
2110C
Racing
constructive algorithms
,
greedy
1400
x16384
2109C1
Hacking Numbers (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
,
number theory
1500
x11911
2108B
SUMdamental Decomposition
bitmasks
,
constructive algorithms
,
greedy
,
implementation
,
math
1300
x14995
2107C
Maximum Subarray Sum
binary search
,
constructive algorithms
,
dp
,
implementation
,
math
1500
x12599
2101A
Mex in the Grid
constructive algorithms
,
implementation
1300
x15654
2094F
Trulimero Trulicina
constructive algorithms
1600
x11894
2092C
Asuna and the Mosquitoes
constructive algorithms
,
greedy
,
math
1200
x23300
2085C
Serval and The Formula
bitmasks
,
constructive algorithms
,
dp
,
greedy
1600
x14131
2085B
Serval and Final MEX
constructive algorithms
,
implementation
1200
x17556
2084D
Arcology On Permafrost
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
1600
x9210
2084C
You Soared Afar With Grace
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x12119
2077A
Breach of Faith
constructive algorithms
,
greedy
,
math
,
sortings
1500
x15072
2075B
Array Recoloring
constructive algorithms
,
greedy
1300
x19429
2072E
Do You Love Your Hero and His Two-Hit Multi-Target Attacks?
binary search
,
brute force
,
constructive algorithms
,
dp
,
geometry
,
greedy
,
math
1500
x12739
2072C
Creating Keys for StORages Has Become My Main Skill
bitmasks
,
constructive algorithms
,
greedy
1200
x20117
2065E
Skibidus and Rizz
constructive algorithms
,
greedy
,
strings
1600
x12473
2064C
Remove the Ends
brute force
,
constructive algorithms
,
dp
,
greedy
1300
x18289
2059C
Customer Service
brute force
,
constructive algorithms
,
graph matchings
,
greedy
,
math
,
sortings
1600
x12918
2059B
Cost of the Array
brute force
,
constructive algorithms
,
greedy
,
math
1300
x19236
2057C
Trip to the Olympiad
bitmasks
,
constructive algorithms
,
greedy
,
math
1500
x14219
2056C
Palindromic Subsequences
brute force
,
constructive algorithms
,
math
1200
x19903
2055C
The Trail
brute force
,
constructive algorithms
,
greedy
,
math
,
two pointers
1400
x17705
2052A
Adrenaline Rush
constructive algorithms
1600
x4467
2049C
MEX Cycle
brute force
,
constructive algorithms
,
greedy
,
implementation
1500
x14041
2049B
pspspsps
brute force
,
constructive algorithms
,
graph matchings
,
implementation
1300
x19352
2041E
Beautiful Array
constructive algorithms
,
math
1200
x10275
2040C
Ordered Permutations
bitmasks
,
combinatorics
,
constructive algorithms
,
greedy
,
math
,
two pointers
1600
x11136
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x9893
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x11854
2034D
Darius' Wisdom
constructive algorithms
,
greedy
,
implementation
,
sortings
1600
x6844
2034C
Trapped in the Witch's Labyrinth
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
1400
x9435
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x16172
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x13026
2026B
Black Cells
binary search
,
brute force
,
constructive algorithms
,
greedy
1300
x16923
2023A
Concatenation of Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1300
x17041
2021C1
Adjust The Presentation (Easy Version)
constructive algorithms
,
greedy
1300
x14412
2013C
Password Cracking
constructive algorithms
,
interactive
,
strings
1400
x14947
2003C
Turtle and Good Pairs
constructive algorithms
,
greedy
,
sortings
,
strings
1200
x22204
1991C
Absolute Zero
constructive algorithms
,
greedy
,
math
1300
x18088
1990B
Array Craft
constructive algorithms
,
greedy
1200
x20226
1988C
Increasing Sequence with Fixed OR
bitmasks
,
constructive algorithms
,
greedy
1300
x20715
1983B
Corner Twist
constructive algorithms
,
greedy
,
implementation
,
math
1200
x18680
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x13390
1980C
Sofia and the Lost Operations
constructive algorithms
,
greedy
1300
x22080
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x22608
1978C
Manhattan Permutations
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1300
x18143
1974D
Ingenuity-2
constructive algorithms
,
greedy
,
implementation
1400
x18139
1968E
Cells Arrangement
constructive algorithms
1600
x12933
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x15450
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x21672
1935B
Informatics in MAC
constructive algorithms
1200
x21204
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combine-tags-by-or
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2-sat
binary search
bitmasks
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combinatorics
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constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
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implementation
interactive
math
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number theory
probabilities
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sortings
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strings
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