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combinatorics
combine-tags-by-or
*combine tags by OR
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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Custom test
Problems
#
Name
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x36343
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x33608
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x28459
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x27494
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x27147
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x25280
1674B
Dictionary
combinatorics
,
math
800
x24706
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x23688
1543B
Customising the Track
combinatorics
,
greedy
,
math
900
x22064
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x21942
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x21596
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x20993
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x20908
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x20861
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x20814
610A
Pasha and Stick
combinatorics
,
math
1000
x20784
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x20580
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x20273
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x20075
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x19580
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x19172
630C
Lucky Numbers
combinatorics
,
math
1100
x19037
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x18997
1821A
Matching
combinatorics
,
math
800
x18407
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18038
1582B
Luntik and Subsequences
combinatorics
,
math
900
x17519
1433E
Two Round Dances
combinatorics
,
math
1300
x17437
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x16637
617B
Chocolate
combinatorics
1300
x16511
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x15991
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x15937
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x15784
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x15669
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x15146
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x14972
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x14566
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x14435
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14226
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x13815
1166A
Silent Classroom
combinatorics
,
greedy
900
x13530
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13065
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x12895
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x12876
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x12789
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x12682
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x12644
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x12187
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12142
1288C
Two Arrays
combinatorics
,
dp
1600
x11817
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11768
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x11518
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x11513
1569C
Jury Meeting
combinatorics
,
math
1500
x11144
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11111
322B
Ciel and Flowers
combinatorics
,
math
1600
x11077
584B
Kolya and Tanya
combinatorics
1500
x11055
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x10817
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x10814
1594E1
Rubik's Cube Coloring (easy version)
combinatorics
,
math
1300
x10581
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x10478
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10378
1236B
Alice and the List of Presents
combinatorics
,
math
1500
x10365
1436C
Binary Search
binary search
,
combinatorics
1500
x10278
131C
The World is a Theatre
combinatorics
,
math
1400
x10206
152C
Pocket Book
combinatorics
1400
x9925
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x9868
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x9772
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x9709
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9506
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9410
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9369
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x8967
978E
Bus Video System
combinatorics
,
math
1400
x8915
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x8857
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x8806
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x8739
1312D
Count the Arrays
combinatorics
,
math
1700
x8614
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x8407
1762C
Binary Strings are Fun
combinatorics
,
math
1400
x8344
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8286
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8257
1528B
Kavi on Pairing Duty
combinatorics
,
dp
,
math
1700
x8202
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8145
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8099
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x8047
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x7982
1036C
Classy Numbers
combinatorics
,
dp
1900
x7941
1422C
Bargain
combinatorics
,
dp
,
math
1700
x7882
1795D
Triangle Coloring
combinatorics
,
math
1600
x7794
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x7585
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7541
1284C
New Year and Permutation
combinatorics
,
math
1600
x7498
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x7468
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7222
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x7212
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x7068
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7004
1239A
Ivan the Fool and the Probability Theory
combinatorics
,
dp
,
math
1700
x6953
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6894
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x6764
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