Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
Register now »
*has extra registration
→ 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
1310F
Bad Cryptography
math
,
number theory
3400
x67
1973F
Maximum GCD Sum Queries
brute force
,
dp
,
implementation
,
number theory
x75
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x76
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x79
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x81
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x88
1190F
Tokitsukaze and Powers
number theory
,
probabilities
3400
x88
756F
Long number
expression parsing
,
math
,
number theory
3400
x89
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x105
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x117
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x119
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x123
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x131
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x132
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x137
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x137
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x144
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x145
1906G
Grid Game 2
games
,
number theory
2900
x146
1575C
Cyclic Sum
data structures
,
fft
,
number theory
3000
x155
500G
New Year Running
number theory
,
trees
3200
x156
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x169
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x173
1054H
Epic Convolution
chinese remainder theorem
,
fft
,
math
,
number theory
3500
x174
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x184
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x184
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x189
913G
Power Substring
math
,
number theory
3200
x194
1091G
New Year and the Factorisation Collaboration
interactive
,
math
,
number theory
3200
x197
819C
Mister B and Beacons on Field
number theory
2900
x205
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x206
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x212
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x215
819D
Mister B and Astronomers
number theory
2900
x216
1103E
Radix sum
fft
,
math
,
number theory
3400
x221
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x226
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x234
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x238
346E
Doodle Jump
math
,
number theory
3000
x253
1016G
Appropriate Team
bitmasks
,
math
,
number theory
2700
x257
303D
Rotatable Number
math
,
number theory
2600
x279
449E
Jzzhu and Squares
dp
,
math
,
number theory
2900
x282
1027G
X-mouse in the Campus
bitmasks
,
math
,
number theory
2600
x297
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x299
1698G
Long Binary String
bitmasks
,
math
,
matrices
,
meet-in-the-middle
,
number theory
2900
x301
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x313
1644F
Basis
combinatorics
,
fft
,
math
,
number theory
2900
x314
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x315
1552H
Guess the Perimeter
binary search
,
interactive
,
number theory
3300
x316
73E
Morrowindows
math
,
number theory
2400
x323
180B
Divisibility Rules
math
,
number theory
2300
x327
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x328
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x329
1182F
Maximum Sine
binary search
,
data structures
,
number theory
2700
x330
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x333
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x333
1030G
Linear Congruential Generator
number theory
2900
x349
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x354
1418F
Equal Product
data structures
,
math
,
number theory
,
two pointers
3000
x357
1562F
Tubular Bells
interactive
,
math
,
number theory
,
probabilities
2900
x373
1493F
Enchanted Matrix
bitmasks
,
interactive
,
number theory
2600
x375
185D
Visit of the Great
math
,
number theory
2600
x382
360D
Levko and Sets
number theory
2600
x386
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x414
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x416
1630E
Expected Components
combinatorics
,
math
,
number theory
,
probabilities
2900
x424
698F
Coprime Permutation
combinatorics
,
number theory
3000
x431
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x433
93E
Lostborn
dp
,
math
,
number theory
2600
x434
306C
White, Black and White Again
combinatorics
,
number theory
2100
x441
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x449
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x467
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x470
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x472
516E
Drazil and His Happy Friends
math
,
number theory
3100
x474
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x478
1045B
Space Isaac
hashing
,
number theory
2400
x493
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x494
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x497
1436F
Sum Over Subsets
combinatorics
,
math
,
number theory
2800
x500
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x502
1630F
Making It Bipartite
flows
,
graph matchings
,
graphs
,
number theory
3400
x508
653G
Move by Prime
combinatorics
,
math
,
number theory
3100
x516
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x517
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x523
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x523
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x538
216E
Martian Luck
math
,
number theory
2000
x543
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x547
293C
Cube Problem
brute force
,
math
,
number theory
2400
x554
963C
Cutting Rectangle
brute force
,
math
,
number theory
2600
x560
852F
Product transformation
combinatorics
,
math
,
number theory
2200
x560
1582G
Kuzya and Homework
data structures
,
number theory
2600
x561
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x565
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x576
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x579
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x580
364C
Beautiful Set
brute force
,
number theory
2300
x582
703E
Mishka and Divisors
dp
,
number theory
2600
x587
←
1
2
3
...
7
8
→
User lists
Name