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ICPC Challenge
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Before contest
2023-2024 ICPC, Asia Jakarta Regional Contest (Online Mirror, Unrated, ICPC Rules, Teams Preferred)
07:11:57
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Before contest
Educational Codeforces Round 159 (Rated for Div. 2)
17:11:57
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combine-tags-by-or
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Status
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Custom test
Problems
#
Name
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x166
1903E
Geo Game
constructive algorithms
,
dp
,
games
,
greedy
,
interactive
,
math
2000
x915
1903D2
Maximum And Queries (hard version)
binary search
,
bitmasks
,
divide and conquer
,
dp
,
greedy
2500
x226
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x2677
1903C
Theofanis' Nightmare
constructive algorithms
,
dp
,
greedy
1400
x5429
1903B
StORage room
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1200
x6467
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x11571
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x81
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x903
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x4148
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x7393
1901B
Chip and Ribbon
greedy
,
math
1100
x10473
1901A
Line Trip
greedy
,
math
800
x15672
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x109
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1182
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x2505
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
shortest paths
,
trees
1300
x7240
1900B
Laura and Operations
dp
,
math
900
x11299
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x13282
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2172
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x4788
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x10008
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x9070
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x12955
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x13625
1899A
Game with Integers
games
,
math
,
number theory
800
x25772
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x532
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x1553
1898D
Absolute Beauty
greedy
,
math
1900
x3527
1898C
Colorful Grid
constructive algorithms
1700
x3571
1898B
Milena and Admirer
greedy
,
math
1500
x7324
1898A
Milica and String
brute force
,
implementation
,
strings
800
x11814
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x31
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x34
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x121
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x423
1896E
Permutation Sorting
data structures
,
sortings
2100
x1447
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x3594
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x5896
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x9441
1896A
Jagged Swaps
sortings
800
x11210
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x118
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x479
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1216
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x4629
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x8325
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x17549
1895A
Treasure Chest
math
800
x20563
1894B
Two Out of Three
constructive algorithms
1000
x11698
1894A
Secret Sport
implementation
,
strings
800
x15443
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x105
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x670
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x1952
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x6596
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8946
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x2794
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x630
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3193
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x8688
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x12674
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x16409
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x14734
1890A
Doremy's Paint 3
constructive algorithms
800
x15872
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x44
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x37
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x392
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x709
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2523
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x5642
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x9974
1887F
Minimum Segments
constructive algorithms
3400
x87
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x190
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x641
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1258
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2129
1886F
Diamond Theft
data structures
,
greedy
3300
x136
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1147
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x2931
1886C
Decreasing String
implementation
,
strings
1600
x8466
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x13115
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x21984
1884E
Hard Design
greedy
,
implementation
,
math
2800
x203
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2246
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x4383
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x9620
1884A
Simple Design
brute force
,
greedy
,
math
800
x14347
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x3956
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x6772
1883F
You Are So Beautiful
data structures
1400
x6061
1883E
Look Back
bitmasks
,
greedy
1700
x5409
1883D
In Love
data structures
,
greedy
1500
x7482
1883C
Raspberries
dp
,
math
1000
x16653
1883B
Chemistry
strings
900
x19779
1883A
Morning
math
800
x20059
1882E2
Two Permutations (Hard Version)
constructive algorithms
3100
x229
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x833
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4240
1882C
Card Game
brute force
,
greedy
1500
x9620
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x12505
1882A
Increasing Sequence
greedy
800
x22402
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