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Before contest
Codeforces Round 941 (Div. 1)
29:39:41
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Before contest
Codeforces Round 941 (Div. 2)
29:39:41
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number theory
combine-tags-by-or
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2-sat
binary search
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expression parsing
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Problems
#
Name
122A
Lucky Division
brute force
,
number theory
1000
x115569
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69588
630A
Again Twenty Five!
number theory
800
x61614
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56825
1475A
Odd Divisor
math
,
number theory
900
x54834
313A
Ilya and Bank Account
implementation
,
number theory
900
x53402
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48555
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46294
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42680
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x39710
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38219
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x37995
577A
Multiplication Table
implementation
,
number theory
1000
x37947
1899A
Game with Integers
games
,
math
,
number theory
800
x37239
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35221
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32154
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31606
1549A
Gregor and Cryptography
math
,
number theory
800
x31254
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x30988
1360D
Buying Shovels
math
,
number theory
1300
x30640
1553A
Digits Sum
math
,
number theory
800
x30054
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29590
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29547
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29518
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x29332
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x29061
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28546
26A
Almost Prime
number theory
900
x28411
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27913
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26730
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x26702
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x26373
1543A
Exciting Bets
greedy
,
math
,
number theory
900
x26276
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x26221
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x26055
1455A
Strange Functions
math
,
number theory
800
x25982
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25270
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x25226
1525A
Potion-making
math
,
number theory
800
x25039
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x24996
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24526
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24434
1471A
Strange Partition
greedy
,
math
,
number theory
900
x24408
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24407
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24081
1514A
Perfectly Imperfect Array
math
,
number theory
800
x23766
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x23570
1370C
Number Game
games
,
math
,
number theory
1400
x23479
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x23462
1401C
Mere Array
constructive algorithms
,
math
,
number theory
,
sortings
1300
x23390
1238A
Prime Subtraction
math
,
number theory
900
x23219
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23048
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x22944
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x22708
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x22346
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22326
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22124
1542B
Plus and Multiply
constructive algorithms
,
math
,
number theory
1500
x21983
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x21922
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x21889
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x21854
1872C
Non-coprime Split
math
,
number theory
1100
x21840
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x21725
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21691
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x21452
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21209
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x20735
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x20718
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x20710
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20514
1828B
Permutation Swap
math
,
number theory
900
x20502
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x20405
1605A
A.M. Deviation
math
,
number theory
800
x20313
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20196
1454D
Number into Sequence
constructive algorithms
,
math
,
number theory
1300
x19683
1487B
Cat Cycle
math
,
number theory
1200
x19573
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x19562
1593D1
All are Same
math
,
number theory
1100
x19536
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x19407
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19314
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x19232
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x19150
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19102
1945B
Fireworks
math
,
number theory
900
x19076
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18504
1656C
Make Equal With Mod
constructive algorithms
,
math
,
number theory
,
sortings
1200
x18440
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18345
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x18277
1932B
Chaya Calendar
number theory
1100
x18122
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18064
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x17919
762A
k-th divisor
math
,
number theory
1400
x17872
1411B
Fair Numbers
brute force
,
number theory
1000
x17706
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17497
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17476
664A
Complicated GCD
math
,
number theory
800
x17364
1736B
Playing with GCD
math
,
number theory
1200
x17209
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17114
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17009
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x16975
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