Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 164 (Rated for Div. 2)
2 days
Register now »
→ Filter Problems
Difficulty:
—
number theory
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x16822
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x16789
235A
LCM Challenge
number theory
1600
x16692
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16646
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16643
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x16599
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x16416
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16357
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16239
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16144
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16104
1603A
Di-visible Confusion
constructive algorithms
,
math
,
number theory
1300
x16048
456B
Fedya and Maths
math
,
number theory
1200
x15916
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x15818
1458A
Row GCD
math
,
number theory
1600
x15805
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15791
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15712
1826B
Lunatic Never Content
math
,
number theory
1100
x15468
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15296
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x15173
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15155
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x15042
1165D
Almost All Divisors
math
,
number theory
1600
x14918
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x14905
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x14901
1107B
Digital root
math
,
number theory
1000
x14743
1277B
Make Them Odd
greedy
,
number theory
1200
x14563
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x14492
84A
Toy Army
math
,
number theory
900
x14466
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14332
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14308
1514C
Product 1 Modulo N
greedy
,
number theory
1600
x14105
1881D
Divide and Equalize
math
,
number theory
1300
x13993
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x13966
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x13862
797A
k-Factorization
implementation
,
math
,
number theory
1100
x13779
1606C
Banknotes
greedy
,
number theory
1400
x13662
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13559
1583A
Windblume Ode
math
,
number theory
800
x13515
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13468
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x13427
1542C
Strange Function
math
,
number theory
1600
x13426
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13398
236B
Easy Number Challenge
implementation
,
number theory
1300
x13347
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13284
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13253
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13210
576A
Vasya and Petya's Game
math
,
number theory
1500
x13096
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x13000
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x12992
1538D
Another Problem About Dividing Numbers
constructive algorithms
,
math
,
number theory
1700
x12925
1758C
Almost All Multiples
greedy
,
number theory
1400
x12778
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12644
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12622
735D
Taxes
math
,
number theory
1600
x12568
1444A
Division
brute force
,
math
,
number theory
1500
x12488
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x12481
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12460
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12436
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x12294
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12293
633A
Ebony and Ivory
brute force
,
math
,
number theory
1100
x12253
1765M
Minimum LCM
math
,
number theory
1000
x12246
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12238
707C
Pythagorean Triples
math
,
number theory
1500
x12215
460B
Little Dima and Equation
brute force
,
implementation
,
math
,
number theory
1500
x12051
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x11963
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x11955
1753B
Factorial Divisibility
math
,
number theory
1600
x11916
75C
Modified GCD
binary search
,
number theory
1600
x11880
1759D
Make It Round
brute force
,
number theory
1400
x11870
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x11784
743C
Vladik and fractions
brute force
,
constructive algorithms
,
math
,
number theory
1500
x11764
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x11763
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x11552
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11551
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11517
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11494
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11468
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11399
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11399
1220B
Multiplication Table
math
,
number theory
1300
x11315
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x11268
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11143
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11100
1068B
LCM
math
,
number theory
1200
x11000
787A
The Monster
brute force
,
math
,
number theory
1200
x10980
371B
Fox Dividing Cheese
math
,
number theory
1300
x10842
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x10679
946B
Weird Subtraction Process
math
,
number theory
1100
x10643
630J
Divisibility
math
,
number theory
1100
x10620
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10611
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
x10520
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10482
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x10077
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10010
1877C
Joyboard
math
,
number theory
1200
x9912
1143B
Nirvana
brute force
,
math
,
number theory
1200
x9823
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x9819
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x9768
←
1
2
3
4
...
6
7
→
User lists
Name