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math
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
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number theory
probabilities
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ternary search
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Problems
#
Name
1345A
Puzzle Pieces
math
800
x23813
507B
Amr and Pins
geometry
,
math
1400
x23839
1594A
Consecutive Sum Riddle
math
800
x23842
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x23862
1451A
Subtract or Divide
greedy
,
math
800
x23921
1883A
Morning
math
800
x23954
1613A
Long Comparison
implementation
,
math
900
x23962
1646A
Square Counting
math
800
x23988
1391A
Suborrays
constructive algorithms
,
math
800
x24006
1624C
Division by Two and Permutation
constructive algorithms
,
flows
,
graph matchings
,
greedy
,
math
1100
x24037
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24082
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24159
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x24194
1917A
Least Product
constructive algorithms
,
math
800
x24195
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x24208
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x24319
1463A
Dungeon
binary search
,
math
1100
x24461
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x24527
1497C1
k-LCM (easy version)
constructive algorithms
,
math
1200
x24535
1471A
Strange Partition
greedy
,
math
,
number theory
900
x24540
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24547
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24549
1607B
Odd Grasshopper
math
900
x24591
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24599
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x24632
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24646
1945A
Setting up Camp
greedy
,
math
800
x24661
1741B
Funny Permutation
constructive algorithms
,
math
800
x24792
598A
Tricky Sum
math
900
x24876
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x24973
1719A
Chip Game
games
,
math
800
x25013
1304A
Two Rabbits
math
800
x25017
1525A
Potion-making
math
,
number theory
800
x25070
1517A
Sum of 2050
greedy
,
math
800
x25102
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25191
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x25209
1901A
Line Trip
greedy
,
math
800
x25255
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25327
450B
Jzzhu and Sequences
implementation
,
math
1300
x25344
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x25388
1968A
Maximize?
brute force
,
math
,
number theory
800
x25423
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25483
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x25489
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25521
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25564
1350A
Orac and Factors
math
900
x25570
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x25603
1674B
Dictionary
combinatorics
,
math
800
x25625
1674A
Number Transformation
constructive algorithms
,
math
800
x25676
1814A
Coins
implementation
,
math
800
x25685
1550B
Maximum Cost Deletion
greedy
,
math
1000
x25732
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x25803
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x25840
1455A
Strange Functions
math
,
number theory
800
x26041
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x26056
1560C
Infinity Table
implementation
,
math
800
x26104
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26121
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x26162
1537C
Challenging Cliffs
constructive algorithms
,
greedy
,
implementation
,
math
1200
x26342
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x26363
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26396
1543A
Exciting Bets
greedy
,
math
,
number theory
900
x26414
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26480
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x26518
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x26663
1650B
DIV + MOD
math
900
x26840
1401A
Distance and Axis
constructive algorithms
,
math
900
x26893
1398A
Bad Triangle
geometry
,
math
800
x26994
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27020
1849A
Morning Sandwich
implementation
,
math
800
x27058
1855A
Dalton the Teacher
greedy
,
math
800
x27180
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27265
1421A
XORwice
bitmasks
,
greedy
,
math
800
x27269
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27275
1234A
Equalize Prices Again
math
800
x27280
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x27281
1555A
PizzaForces
brute force
,
math
900
x27288
1921C
Sending Messages
greedy
,
math
900
x27297
1285A
Mezo Playing Zoma
math
800
x27299
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27468
1660B
Vlad and Candies
math
800
x27527
1788A
One and Two
brute force
,
implementation
,
math
800
x27593
1550A
Find The Array
greedy
,
math
800
x27661
1853A
Desorting
brute force
,
greedy
,
math
800
x27998
1537B
Bad Boy
constructive algorithms
,
greedy
,
math
900
x28012
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x28013
1843B
Long Long
greedy
,
math
,
two pointers
800
x28047
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28151
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28253
1519A
Red and Blue Beans
math
800
x28299
1341A
Nastya and Rice
math
900
x28346
1256A
Payment Without Change
math
1000
x28440
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x28449
1878C
Vasilije in Cacak
math
900
x28470
1714A
Everyone Loves to Sleep
implementation
,
math
900
x28527
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28535
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x28553
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x28595
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x28631
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28722
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