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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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Problems
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Status
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Custom test
Problems
#
Name
2038N
Fixing the Expression
implementation
800
x5644
2038J
Waiting for...
greedy
,
implementation
800
x4332
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x14657
2037B
Intercepted Inputs
brute force
,
implementation
800
x17012
2037A
Twice
implementation
800
x21932
2036B
Startup
greedy
,
sortings
800
x22738
2036A
Quintomania
implementation
800
x30154
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14519
2035A
Sliding
implementation
,
math
800
x14736
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x22822
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32712
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x20096
2031B
Penchick and Satay Sticks
brute force
,
greedy
,
sortings
900
x13137
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x14354
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19985
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23328
2029A
Set
greedy
,
math
800
x10829
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13629
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x18419
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15823
2025A
Two Screens
binary search
,
greedy
,
strings
,
two pointers
800
x23396
2024A
Profitable Interest Rate
greedy
,
math
800
x18744
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13697
2021A
Meaning Mean
data structures
,
greedy
,
math
,
sortings
800
x18538
2020A
Find Minimum Operations
bitmasks
,
brute force
,
greedy
,
math
,
number theory
800
x21832
2019A
Max Plus Size
brute force
,
dp
,
greedy
800
x22798
2014B
Robin Hood and the Major Oak
math
800
x28184
2014A
Robin Helps
greedy
,
implementation
800
x36935
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x22923
2013A
Zhan's Blender
constructive algorithms
,
math
800
x27069
2010B
Three Brothers
brute force
,
implementation
,
math
800
x19823
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x16759
2009B
osu!mania
brute force
,
implementation
800
x41744
2009A
Minimize!
brute force
,
math
800
x51245
2008C
Longest Good Array
binary search
,
brute force
,
math
800
x30305
2008B
Square or Not
brute force
,
math
,
strings
800
x28471
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x35152
2007B
Index and Maximum Value
data structures
,
greedy
900
x21164
2007A
Dora's Set
greedy
,
math
,
number theory
800
x22619
2005B1
The Strict Teacher (Easy Version)
greedy
,
math
,
sortings
1000
x19930
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x21635
2004B
Game with Doors
brute force
,
greedy
1000
x26054
2004A
Closest Point
implementation
,
math
800
x30265
2003B
Turtle and Piggy Are Playing a Game 2
games
,
greedy
,
sortings
800
x25101
2003A
Turtle and Good Strings
greedy
,
strings
800
x28913
2002B
Removals Game
constructive algorithms
,
games
1000
x18836
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x19432
2001B
Generate Permutation
constructive algorithms
800
x24004
2001A
Make All Equal
greedy
,
implementation
800
x29542
2000C
Numeric String Template
data structures
,
strings
1000
x25402
2000B
Seating in a Bus
two pointers
800
x33797
2000A
Primary Task
implementation
,
math
,
strings
800
x37333
1999C
Showering
greedy
,
implementation
800
x35090
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x32429
1999A
A+B Again?
implementation
,
math
800
x56165
1998B
Minimize Equal Sum Subarrays
constructive algorithms
,
math
,
number theory
1000
x23801
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x23947
1997A
Strong Password
brute force
,
implementation
,
strings
800
x29245
1996B
Scale
greedy
,
implementation
800
x32594
1996A
Legs
binary search
,
math
,
ternary search
800
x43302
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x24246
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x20253
1993A
Question Marks
greedy
,
implementation
800
x29427
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x29151
1992B
Angry Monk
greedy
,
math
,
sortings
800
x34314
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x41387
1991A
Maximize the Last Element
greedy
,
implementation
800
x21871
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x22742
1989A
Catch the Coin
implementation
800
x26410
1988B
Make Majority
greedy
,
implementation
900
x22820
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x23289
1987B
K-Sort
greedy
1000
x20509
1987A
Upload More RAM
greedy
,
math
800
x25396
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x26668
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x40634
1985D
Manhattan Circle
implementation
,
math
900
x34704
1985C
Good Prefixes
greedy
1000
x32508
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x46520
1985A
Creating Words
implementation
,
strings
800
x54156
1984A
Strange Splitting
constructive algorithms
800
x21186
1983A
Array Divisibility
constructive algorithms
,
math
800
x25711
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x25187
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x22330
1980B
Choosing Cubes
sortings
,
sortings
800
x34767
1980A
Problem Generator
math
800
x40774
1979B
XOR Sequences
bitmasks
,
greedy
1000
x22660
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x29089
1978B
New Bakery
binary search
,
greedy
,
math
,
ternary search
800
x22417
1978A
Alice and Books
constructive algorithms
,
greedy
,
sortings
800
x25786
1977A
Little Nikita
math
800
x33210
1976A
Verify Password
implementation
,
sortings
,
strings
800
x28674
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x17915
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x18554
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x30356
1974A
Phone Desktop
greedy
,
math
800
x33308
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x24635
1972B
Coin Games
games
900
x21698
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x23008
1971C
Clock and Strings
implementation
900
x33313
1971B
Different String
implementation
,
strings
800
x37115
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