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#
Name
2119C
A Good Problem
bitmasks
,
constructive algorithms
,
math
1300
x16281
2119B
Line Segments
geometry
,
greedy
,
math
1200
x18281
2119A
Add or XOR
bitmasks
,
greedy
,
math
800
x27171
2118F
Shifts and Swaps
data structures
,
graphs
,
hashing
,
trees
3100
x281
2118E
Grid Coloring
constructive algorithms
,
geometry
,
greedy
,
math
2400
x1424
2118D2
Red Light, Green Light (Hard version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2200
x2495
2118D1
Red Light, Green Light (Easy version)
brute force
,
dfs and similar
,
dp
,
graphs
,
implementation
,
number theory
1700
x8448
2118C
Make It Beautiful
bitmasks
,
data structures
,
greedy
,
math
1300
x18455
2118B
Make It Permutation
constructive algorithms
1200
x20024
2118A
Equal Subsequences
constructive algorithms
,
greedy
800
x29103
2117H
Incessant Rain
data structures
,
divide and conquer
,
sortings
2500
x982
2117G
Omg Graph
brute force
,
dsu
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x5139
2117F
Wildflower
combinatorics
,
dfs and similar
,
trees
1800
x5924
2117E
Lost Soul
brute force
,
greedy
1600
x11839
2117D
Retaliation
binary search
,
math
,
number theory
1200
x22107
2117C
Cool Partition
data structures
,
greedy
1200
x21050
2117B
Shrink
constructive algorithms
800
x32150
2117A
False Alarm
greedy
,
implementation
800
x38006
2116B
Gellyfish and Baby's Breath
greedy
,
math
,
sortings
1300
x17543
2116A
Gellyfish and Tricolor Pansy
games
,
greedy
800
x26956
2115F2
Gellyfish and Lycoris Radiata (Hard Version)
data structures
3500
x109
2115F1
Gellyfish and Lycoris Radiata (Easy Version)
data structures
3500
x119
2115E
Gellyfish and Mayflower
dp
,
graphs
3500
x236
2115D
Gellyfish and Forget-Me-Not
bitmasks
,
dp
,
games
,
greedy
,
math
2900
x1100
2115C
Gellyfish and Eternal Violet
combinatorics
,
dp
,
greedy
,
math
,
probabilities
2700
x913
2115B
Gellyfish and Camellia Japonica
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2100
x3969
2115A
Gellyfish and Flaming Peony
constructive algorithms
,
dp
,
math
,
number theory
1500
x14931
2114G
Build an Array
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
,
number theory
2200
x2036
2114F
Small Operations
binary search
,
brute force
,
dfs and similar
,
dp
,
math
,
number theory
,
sortings
2000
x5496
2114E
Kirei Attacks the Estate
dfs and similar
,
dp
,
greedy
,
trees
1400
x13985
2114D
Come a Little Closer
brute force
,
greedy
,
implementation
,
math
1400
x14627
2114C
Need More Arrays
dp
,
greedy
1000
x30865
2114B
Not Quite a Palindromic String
greedy
,
math
900
x30483
2114A
Square Year
binary search
,
brute force
,
math
800
x43145
2113F
Two Arrays
constructive algorithms
,
dfs and similar
,
graphs
,
math
2500
x950
2113E
From Kazan with Love
dfs and similar
,
graphs
,
implementation
,
trees
2800
x406
2113D
Cheater
binary search
,
constructive algorithms
,
greedy
,
implementation
2200
x2875
2113C
Smilo and Minecraft
brute force
,
constructive algorithms
,
greedy
1700
x7967
2113B
Good Start
constructive algorithms
,
math
1200
x14611
2113A
Shashliks
greedy
,
math
800
x20499
2112F
Variables and Operations
graphs
,
greedy
,
shortest paths
2800
x637
2112E
Tree Colorings
combinatorics
,
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2200
x3376
2112D
Reachability and Tree
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x9432
2112C
Coloring Game
binary search
,
brute force
,
greedy
,
two pointers
1300
x17707
2112B
Shrinking Array
brute force
,
greedy
1100
x21097
2112A
Race
implementation
,
math
800
x29244
2111G
Divisible Subarrays
binary search
,
bitmasks
,
brute force
,
data structures
,
interactive
2900
x398
2111F
Puzzle
brute force
,
constructive algorithms
,
greedy
,
math
2400
x1424
2111E
Changing the String
binary search
,
data structures
,
greedy
,
implementation
,
sortings
,
strings
1900
x5404
2111D
Creating a Schedule
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1400
x11980
2111C
Equal Values
brute force
,
greedy
,
two pointers
1100
x19420
2111B
Fibonacci Cubes
brute force
,
dp
,
implementation
,
math
1100
x17877
2111A
Energy Crystals
greedy
,
implementation
,
math
800
x20720
2110F
Faculty
brute force
,
greedy
,
math
,
number theory
2400
x1913
2110E
Melody
dfs and similar
,
graphs
,
implementation
2300
x2712
2110D
Fewer Batteries
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
hashing
1700
x8599
2110C
Racing
constructive algorithms
,
greedy
1400
x15811
2110B
Down with Brackets
strings
900
x27329
2110A
Fashionable Array
implementation
,
sortings
800
x29796
2109F
Penguin Steps
binary search
,
dfs and similar
,
flows
,
graphs
,
shortest paths
3000
x274
2109E
Binary String Wowee
combinatorics
,
dp
,
strings
2400
x1792
2109D
D/D/D
dfs and similar
,
graphs
,
greedy
,
shortest paths
1900
x5615
2109C3
Hacking Numbers (Hard Version)
constructive algorithms
,
interactive
,
math
,
number theory
2600
x3189
2109C2
Hacking Numbers (Medium Version)
constructive algorithms
,
interactive
,
math
,
number theory
1700
x8622
2109C1
Hacking Numbers (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
,
number theory
1500
x11403
2109B
Slice to Survive
bitmasks
,
greedy
,
math
1200
x17322
2109A
It's Time To Duel
implementation
800
x26943
2108F
Fallen Towers
binary search
,
greedy
2900
x547
2108E
Spruce Dispute
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
,
trees
2600
x888
2108D
Needle in a Numstack
binary search
,
brute force
,
implementation
,
interactive
2200
x2418
2108C
Neo's Escape
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
graphs
,
greedy
,
implementation
1500
x14649
2108B
SUMdamental Decomposition
bitmasks
,
constructive algorithms
,
greedy
,
implementation
,
math
1300
x14537
2108A
Permutation Warm-Up
combinatorics
,
greedy
,
math
800
x22138
2107F2
Cycling (Hard Version)
binary search
,
brute force
,
data structures
,
dp
,
greedy
2800
x506
2107F1
Cycling (Easy Version)
binary search
,
brute force
,
dp
,
greedy
2300
x1821
2107E
Ain and Apple Tree
binary search
,
constructive algorithms
,
greedy
,
math
,
trees
2600
x932
2107D
Apple Tree Traversing
brute force
,
dfs and similar
,
greedy
,
implementation
,
trees
2100
x3553
2107C
Maximum Subarray Sum
binary search
,
constructive algorithms
,
dp
,
implementation
,
math
1500
x12083
2107B
Apples in Boxes
games
,
greedy
,
math
1100
x19789
2107A
LRC and VIP
greedy
,
number theory
800
x22197
2106G2
Baudelaire (hard version)
binary search
,
dfs and similar
,
divide and conquer
,
implementation
,
interactive
,
trees
2500
x609
2106G1
Baudelaire (easy version)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
interactive
,
trees
2200
x1612
2106F
Goblin
dfs and similar
,
dp
,
dsu
,
greedy
,
math
1900
x4418
2106E
Wolf
binary search
,
greedy
,
math
1800
x5929
2106D
Flower Boy
binary search
,
dp
,
greedy
,
two pointers
1500
x12253
2106C
Cherry Bomb
greedy
,
math
,
sortings
1000
x25582
2106B
St. Chroma
constructive algorithms
,
greedy
,
math
900
x28361
2106A
Dr. TC
brute force
,
math
800
x36342
2104G
Modulo 3
data structures
,
divide and conquer
,
dsu
,
graphs
,
trees
2700
x534
2104F
Numbers and Strings
binary search
,
brute force
,
dfs and similar
,
dp
,
implementation
,
math
2600
x725
2104E
Unpleasant Strings
binary search
,
dp
,
greedy
,
strings
1700
x8085
2104D
Array and GCD
binary search
,
greedy
,
math
,
number theory
1400
x13218
2104C
Card Game
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1100
x17373
2104B
Move to the End
brute force
,
data structures
,
dp
,
greedy
,
implementation
1000
x20743
2104A
Three Decks
math
800
x26289
2103F
Maximize Nor
bitmasks
,
data structures
,
dp
,
implementation
,
sortings
2600
x618
2103E
Keep the Sum
constructive algorithms
,
implementation
,
two pointers
2600
x600
2103D
Local Construction
constructive algorithms
,
dfs and similar
,
implementation
,
two pointers
2000
x3980
2103C
Median Splits
binary search
,
greedy
,
implementation
,
sortings
1600
x10545
2103B
Binary Typewriter
greedy
,
math
1100
x17696
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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
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binary search
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graphs
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