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Problems
#
Name
630A
Again Twenty Five!
number theory
800
x62088
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x57051
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48806
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46557
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42865
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38402
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x38213
1899A
Game with Integers
games
,
math
,
number theory
800
x37973
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31706
1549A
Gregor and Cryptography
math
,
number theory
800
x31353
1553A
Digits Sum
math
,
number theory
800
x30157
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29918
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x29361
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x28014
1455A
Strange Functions
math
,
number theory
800
x26041
1968A
Maximize?
brute force
,
math
,
number theory
800
x25464
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25329
1525A
Potion-making
math
,
number theory
800
x25070
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24605
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24549
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24547
1514A
Perfectly Imperfect Array
math
,
number theory
800
x23797
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x22973
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21247
1605A
A.M. Deviation
math
,
number theory
800
x20333
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x19611
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19149
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18560
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18368
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17529
664A
Complicated GCD
math
,
number theory
800
x17425
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17138
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x17009
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16933
1583A
Windblume Ode
math
,
number theory
800
x13531
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13249
1475A
Odd Divisor
math
,
number theory
900
x55302
313A
Ilya and Bank Account
implementation
,
number theory
900
x53642
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29616
26A
Almost Prime
number theory
900
x28587
1543A
Exciting Bets
greedy
,
math
,
number theory
900
x26416
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x25307
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25121
1471A
Strange Partition
greedy
,
math
,
number theory
900
x24542
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x23800
1238A
Prime Subtraction
math
,
number theory
900
x23271
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x22420
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x21888
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21758
1828B
Permutation Swap
math
,
number theory
900
x20657
1945B
Fireworks
math
,
number theory
900
x19641
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x16675
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x15268
84A
Toy Army
math
,
number theory
900
x14574
267A
Subtractions
math
,
number theory
900
x7140
122A
Lucky Division
brute force
,
number theory
1000
x116255
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x39923
577A
Multiplication Table
implementation
,
number theory
1000
x38092
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35342
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x31152
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29708
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x29460
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x26366
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24159
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x23615
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x21953
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x20833
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x19174
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x17999
1411B
Fair Numbers
brute force
,
number theory
1000
x17819
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x16509
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x15092
1107B
Digital root
math
,
number theory
1000
x14831
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14419
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x13890
1765M
Minimum LCM
math
,
number theory
1000
x12670
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7750
177B1
Rectangular Game
number theory
1000
x3991
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x26896
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23102
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22426
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22223
1872C
Non-coprime Split
math
,
number theory
1100
x21998
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x21970
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x21691
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x20514
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20482
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x20291
1593D1
All are Same
math
,
number theory
1100
x19573
1932B
Chaya Calendar
number theory
1100
x18377
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x18104
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16566
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16195
1826B
Lunatic Never Content
math
,
number theory
1100
x15745
797A
k-Factorization
implementation
,
math
,
number theory
1100
x14005
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12702
633A
Ebony and Ivory
brute force
,
math
,
number theory
1100
x12315
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11257
630J
Divisibility
math
,
number theory
1100
x10686
946B
Weird Subtraction Process
math
,
number theory
1100
x10671
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