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Before contest
Codeforces Round #794 (Div. 1)
34:52:18
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Before contest
Codeforces Round #794 (Div. 2)
34:52:18
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combine-tags-by-or
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Problems
#
Name
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x41248
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x34502
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x33986
630A
Again Twenty Five!
number theory
800
x33293
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x31297
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x29300
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x28570
1549A
Gregor and Cryptography
math
,
number theory
800
x24821
822A
I'm bored with life
implementation
,
math
,
number theory
800
x23775
1553A
Digits Sum
math
,
number theory
800
x23502
1455A
Strange Functions
math
,
number theory
800
x22892
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x22787
1525A
Potion-making
math
,
number theory
800
x22238
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x22184
1514A
Perfectly Imperfect Array
math
,
number theory
800
x21152
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x19955
1605A
A.M. Deviation
math
,
number theory
800
x17835
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x15579
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x14600
664A
Complicated GCD
math
,
number theory
800
x13281
1583A
Windblume Ode
math
,
number theory
800
x12318
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x11646
313A
Ilya and Bank Account
implementation
,
number theory
900
x37624
1475A
Odd Divisor
math
,
number theory
900
x35294
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x23111
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x22279
1543A
Exciting Bets
greedy
,
math
,
number theory
900
x20839
1471A
Strange Partition
greedy
,
math
,
number theory
900
x20481
1238A
Prime Subtraction
math
,
number theory
900
x19006
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x17771
26A
Almost Prime
number theory
900
x17768
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x16036
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x12918
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x12782
84A
Toy Army
math
,
number theory
900
x11630
267A
Subtractions
math
,
number theory
900
x5087
122A
Lucky Division
brute force
,
number theory
1000
x81192
577A
Multiplication Table
implementation
,
number theory
1000
x28744
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x26924
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x25203
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x23677
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x22867
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x21715
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x20127
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x19065
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x17128
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x16493
1411B
Fair Numbers
brute force
,
number theory
1000
x14585
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x13724
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x12634
1107B
Digital root
math
,
number theory
1000
x12071
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x10211
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x6077
177B1
Rectangular Game
number theory
1000
x3301
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x20575
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x20354
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x18195
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x17840
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x16992
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x15382
1593D1
All are Same
math
,
number theory
1100
x14940
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x10255
633A
Ebony and Ivory
brute force
,
math
,
number theory
1100
x9647
946B
Weird Subtraction Process
math
,
number theory
1100
x9619
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x8909
797A
k-Factorization
implementation
,
math
,
number theory
1100
x8885
630J
Divisibility
math
,
number theory
1100
x8484
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x8193
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x7518
1033B
Square Difference
math
,
number theory
1100
x7444
858A
k-rounding
brute force
,
math
,
number theory
1100
x6818
68A
Irrational problem
implementation
,
number theory
1100
x3995
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x20824
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x19513
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x18791
1487B
Cat Cycle
math
,
number theory
1200
x15148
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x13593
456B
Fedya and Maths
math
,
number theory
1200
x12804
1656C
Make Equal With Mod
constructive algorithms
,
math
,
number theory
,
sortings
1200
x12684
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x12310
1277B
Make Them Odd
greedy
,
number theory
1200
x11464
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x10699
1133B
Preparation for International Women's Day
math
,
number theory
1200
x10269
787A
The Monster
brute force
,
math
,
number theory
1200
x9445
1068B
LCM
math
,
number theory
1200
x9085
1143B
Nirvana
brute force
,
math
,
number theory
1200
x8414
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x6748
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x6588
59B
Fortune Telling
implementation
,
number theory
1200
x5356
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x5250
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5008
177B2
Rectangular Game
number theory
1200
x2370
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2309
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x46583
1360D
Buying Shovels
math
,
number theory
1300
x23005
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x22950
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x20975
1401C
Mere Array
constructive algorithms
,
math
,
number theory
,
sortings
1300
x19113
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x16734
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x16232
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