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Before contest
Codeforces Round 941 (Div. 1)
2 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
→ Filter Problems
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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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Custom test
Problems
#
Name
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x2303
785E
Anton and Permutation
brute force
,
data structures
2200
x1776
785D
Anton and School - 2
combinatorics
,
dp
,
math
,
number theory
2300
x2639
785C
Anton and Fairy Tale
binary search
,
math
1600
x7168
785B
Anton and Classes
greedy
,
sortings
1100
x10125
785A
Anton and Polyhedrons
implementation
,
strings
800
x81762
784G
BF Calculator
*special problem
2000
x719
784F
Crunching Numbers Just for You
*special problem
,
implementation
1900
x990
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1869
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x423
784C
INTERCALC
*special problem
,
implementation
1800
x671
784B
Kids' Riddle
*special problem
2000
x829
784A
Numbers Joke
*special problem
1700
x3107
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x116
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x646
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1018
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2288
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2838
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x8837
780B
The Meeting Place Cannot Be Changed
binary search
1600
x8916
780A
Andryusha and Socks
implementation
800
x18508
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11614
779B
Weird Rounding
brute force
,
greedy
1100
x10179
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9210
778E
Selling Numbers
dp
,
sortings
3000
x295
778D
Parquet Re-laying
constructive algorithms
2700
x481
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x847
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2253
778A
String Game
binary search
,
greedy
,
strings
1700
x11061
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3854
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4906
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6272
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9326
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10032
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x327
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x412
776E
The Holmes Children
math
,
number theory
2100
x2097
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x4773
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5738
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x19227
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11812
775A
University Schedule
*special problem
2900
774L
Bars
*special problem
,
binary search
2000
x321
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1256
774J
Stepan's Series
*special problem
,
dp
2000
x353
774I
Composing Of String
*special problem
,
dp
2300
x100
774H
Repairing Of String
*special problem
,
constructive algorithms
2200
x252
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x173
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x206
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1903
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4018
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
774A
Amusement Park
*special problem
,
ternary search
2100
x294
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x184
773E
Blog Post Rating
data structures
,
sortings
3000
x315
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x561
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x937
773B
Dynamic Problem Scoring
brute force
,
greedy
2000
x1141
773A
Success Rate
binary search
,
math
1700
x4352
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x122
772D
Varying Kibibits
bitmasks
,
dp
2700
x565
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1180
772B
Volatile Kite
geometry
1800
x3090
772A
Voltage Keepsake
binary search
,
math
1800
x4067
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x78
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x439
771D
Bear and Company
dp
2500
x1101
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2785
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6625
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14584
770D
Draw Brackets!
*special problem
,
implementation
1400
x1567
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2523
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2717
770A
New Password
*special problem
,
implementation
800
x18618
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2208
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2097
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3232
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5565
768G
The Winds of Winter
binary search
,
data structures
3300
x353
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x997
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2626
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2749
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3769
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5826
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x26046
767E
Change-free
greedy
2400
x943
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2189
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3951
767B
The Queue
brute force
,
greedy
2100
x2104
767A
Snacktower
data structures
,
implementation
1100
x19174
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2802
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3260
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4311
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x30980
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x28678
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x79
765F
Souvenirs
data structures
3100
x1840
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1246
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2435
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