Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Rayan
→ Pay attention
Before contest
Codeforces Round 1004 (Div. 1)
12:01:07
Register now »
*has extra registration
Before contest
Codeforces Round 1004 (Div. 2)
12:01:07
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
combinatorics
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
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x41692
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x37504
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x34606
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x31931
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x30590
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x29671
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x29302
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x27433
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x27351
1674B
Dictionary
combinatorics
,
math
800
x26863
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x26656
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x24420
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x24192
610A
Pasha and Stick
combinatorics
,
math
1000
x24178
1543B
Customising the Track
combinatorics
,
greedy
,
math
900
x23537
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x23517
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x23482
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x23063
630C
Lucky Numbers
combinatorics
,
math
1100
x23022
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x23021
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x22926
1582B
Luntik and Subsequences
combinatorics
,
math
900
x22292
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x22110
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x21466
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x21446
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x21413
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x21388
1985E
Secret Box
brute force
,
combinatorics
,
math
1200
x21002
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x20717
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x20463
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x20384
1821A
Matching
combinatorics
,
math
800
x20217
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x19639
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x18825
1433E
Two Round Dances
combinatorics
,
math
1300
x18805
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18800
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x18470
617B
Chocolate
combinatorics
1300
x18361
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x18276
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x17937
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x17936
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x17546
2025B
Binomial Coefficients, Kind Of
combinatorics
,
dp
,
math
1100
x17390
1996D
Fun
binary search
,
brute force
,
combinatorics
,
math
,
number theory
1500
x16790
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16529
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x16493
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15801
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x15775
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x15606
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x15524
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x15394
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x15215
2047B
Replace Character
brute force
,
combinatorics
,
greedy
,
strings
900
x14717
1166A
Silent Classroom
combinatorics
,
greedy
900
x14490
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x14298
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x14135
2000E
Photoshoot for Gorillas
combinatorics
,
data structures
,
greedy
,
math
1400
x13973
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x13786
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x13716
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13711
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13601
1288C
Two Arrays
combinatorics
,
dp
1600
x13386
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x13341
2008F
Sakurako's Box
combinatorics
,
math
,
number theory
1400
x13306
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x13017
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x12640
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x12386
1569C
Jury Meeting
combinatorics
,
math
1500
x12327
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x12279
584B
Kolya and Tanya
combinatorics
1500
x12278
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x12223
322B
Ciel and Flowers
combinatorics
,
math
1600
x12010
131C
The World is a Theatre
combinatorics
,
math
1400
x11506
1999F
Expected Median
combinatorics
,
math
1500
x11381
1594E1
Rubik's Cube Coloring (easy version)
combinatorics
,
math
1300
x11351
1236B
Alice and the List of Presents
combinatorics
,
math
1500
x11296
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x11240
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x11131
1436C
Binary Search
binary search
,
combinatorics
1500
x11019
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10950
152C
Pocket Book
combinatorics
1400
x10838
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10767
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10546
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x10545
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x10467
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x10444
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x10279
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
1600
x10223
1036C
Classy Numbers
combinatorics
,
dp
1900
x10181
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x10057
1985G
D-Function
combinatorics
,
math
,
number theory
1600
x10039
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x10013
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9928
1795D
Triangle Coloring
combinatorics
,
math
1600
x9822
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9759
978E
Bus Video System
combinatorics
,
math
1400
x9741
1312D
Count the Arrays
combinatorics
,
math
1700
x9704
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9447
1762C
Binary Strings are Fun
combinatorics
,
math
1400
x9424
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x9343
←
1
2
3
...
7
8
→
User lists
Name