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Before contest
Codeforces Round #792 (Div. 1)
3 days
Before contest
Codeforces Round #792 (Div. 2)
3 days
→ 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
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Problems
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Status
Standings
Custom test
Problems
#
Name
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x28371
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x26692
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x23017
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x21705
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x19488
1543B
Customising the Track
combinatorics
,
greedy
,
math
900
x19245
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x18537
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x17941
1674B
Dictionary
combinatorics
,
math
800
x17846
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x16995
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x16352
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x16201
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x15694
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x15682
610A
Pasha and Stick
combinatorics
,
math
1000
x15667
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x15496
1433E
Two Round Dances
combinatorics
,
math
1300
x15092
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x14561
630C
Lucky Numbers
combinatorics
,
math
1100
x14446
1582B
Luntik and Subsequences
combinatorics
,
math
900
x14328
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x14308
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x13579
617B
Chocolate
combinatorics
1300
x13406
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x12748
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x12482
1166A
Silent Classroom
combinatorics
,
greedy
900
x12448
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x11984
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x11613
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x11028
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x10715
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x10704
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x10608
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x10430
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x10138
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x10071
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x9940
1288C
Two Arrays
combinatorics
,
dp
1600
x9804
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x9803
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x9574
322B
Ciel and Flowers
combinatorics
,
math
1600
x9549
584B
Kolya and Tanya
combinatorics
1500
x9465
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x9309
1236B
Alice and the List of Presents
combinatorics
,
math
1500
x9247
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x9218
1569C
Jury Meeting
combinatorics
,
math
1500
x9078
1436C
Binary Search
binary search
,
combinatorics
1500
x9025
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x8921
1594E1
Rubik's Cube Coloring (easy version)
combinatorics
,
math
1300
x8919
152C
Pocket Book
combinatorics
1400
x8753
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x8720
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x8520
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x8412
131C
The World is a Theatre
combinatorics
,
math
1400
x8411
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x8197
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x7962
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x7824
978E
Bus Video System
combinatorics
,
math
1400
x7619
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x7522
1312D
Count the Arrays
combinatorics
,
math
1700
x7406
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x7333
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x7325
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7082
1528B
Kavi on Pairing Duty
combinatorics
,
dp
,
math
1700
x7039
1422C
Bargain
combinatorics
,
dp
,
math
1700
x6910
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x6857
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x6823
1284C
New Year and Permutation
combinatorics
,
math
1600
x6800
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x6772
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x6719
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6675
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x6658
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x6541
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x6518
1239A
Ivan the Fool and the Probability Theory
combinatorics
,
dp
,
math
1700
x6371
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x5975
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x5894
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x5803
1036C
Classy Numbers
combinatorics
,
dp
1900
x5768
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x5760
1091D
New Year and the Permutation Concatenation
combinatorics
,
dp
,
math
1700
x5757
844B
Rectangles
combinatorics
,
math
1300
x5703
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x5664
608B
Hamming Distance Sum
combinatorics
,
strings
1500
x5577
459C
Pashmak and Buses
combinatorics
,
constructive algorithms
,
math
1900
x5496
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x5401
630F
Selection of Personnel
combinatorics
,
math
1300
x5236
1444B
Divide and Sum
combinatorics
,
math
,
sortings
1900
x5146
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x5087
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5042
1238D
AB-string
binary search
,
combinatorics
,
dp
,
strings
1900
x4863
1207D
Number Of Permutations
combinatorics
1800
x4855
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x4807
1279D
Santa's Bot
combinatorics
,
math
,
probabilities
1700
x4746
204A
Little Elephant and Interval
binary search
,
combinatorics
,
dp
1500
x4676
817B
Makes And The Product
combinatorics
,
implementation
,
math
,
sortings
1500
x4584
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x4580
1102E
Monotonic Renumeration
combinatorics
,
sortings
1700
x4550
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x4474
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x4451
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x4440
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