Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
00:04:28
*has extra registration
→ Filter Problems
Difficulty:
—
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
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x912
643C
Levels and Regions
dp
2400
x1332
641G
Little Artem and Graph
2300
x89
641E
Little Artem and Time Machine
data structures
2000
x3022
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1099
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x827
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1191
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x579
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2629
632F
Magic Matrix
brute force
,
divide and conquer
,
graphs
,
matrices
,
trees
2400
x1053
632E
Thief in a Shop
divide and conquer
,
dp
,
fft
,
math
2400
x2656
632D
Longest Subsequence
brute force
,
math
,
number theory
2100
x3663
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2018
630P
Area of a Star
geometry
2100
x1094
630O
Arrow
geometry
2000
x747
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x975
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x3932
629C
Famil Door and Brackets
dp
,
strings
2000
x2763
628F
Bear and Fair Set
flows
,
graphs
2500
x751
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x872
628D
Magic Numbers
dp
2200
x5690
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1158
626F
Group Projects
dp
2400
x2733
626E
Simple Skewness
binary search
,
math
,
ternary search
2400
x1308
625D
Finals in arithmetic
constructive algorithms
,
implementation
,
math
2400
x626
623B
Array GCD
dp
,
greedy
,
number theory
2300
x2059
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x2019
621E
Wet Shark and Blocks
dp
,
matrices
2000
x2759
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x968
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5367
620D
Professor GukiZ and Two Arrays
binary search
,
two pointers
2200
x1668
618E
Robot Arm
data structures
,
geometry
2500
x588
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1700
617E
XOR and Favorite Number
data structures
2200
x8082
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2782
615E
Hexagons
binary search
,
implementation
,
math
2100
x968
615D
Multipliers
math
,
number theory
2000
x3842
615C
Running Track
dp
,
greedy
,
strings
,
trees
2000
x2263
613C
Necklace
constructive algorithms
,
math
2500
x992
612E
Square Root of Permutation
combinatorics
,
constructive algorithms
,
dfs and similar
,
graphs
,
math
2200
x1620
611F
New Year and Cleaning
binary search
,
implementation
2500
x462
611E
New Year and Three Musketeers
data structures
,
greedy
,
sortings
2400
x861
611D
New Year and Ancient Prophecy
dp
,
hashing
,
strings
2000
x2565
610E
Alphabet Permutations
data structures
,
strings
2500
x859
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1463
609F
Frogs and mosquitoes
data structures
,
greedy
2500
x1217
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x7393
609D
Gadgets for dollars and pounds
binary search
,
greedy
,
two pointers
2000
x2644
607C
Marbles
hashing
,
strings
2500
x782
605D
Board Game
data structures
,
dfs and similar
2500
x795
605C
Freelancer's Dreams
geometry
2400
x1101
603C
Lieges of Legendre
games
,
math
2200
x1815
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1101
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1294
601B
Lipshitz Sequence
data structures
,
math
2100
x2269
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x13049
600D
Area of Two Circles' Intersection
geometry
2000
x2192
598E
Chocolate Bar
brute force
,
dp
2000
x4748
598C
Nearest vectors
geometry
,
sortings
2300
x4238
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x390
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x680
594D
REQ
data structures
,
number theory
2500
x1565
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x677
594B
Max and Bike
binary search
,
geometry
2500
x490
594A
Warrior and Archer
games
2300
x1698
593E
Strange Calculation and Cats
dp
,
matrices
2400
x586
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1218
593C
Beautiful Function
constructive algorithms
,
math
2200
x279
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2553
590D
Top Secret Task
dp
2300
x1153
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2707
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1889
587C
Duff in the Army
data structures
,
trees
2200
x3750
587B
Duff in Beach
dp
2100
x1383
585D
Lizard Era: Beginning
meet-in-the-middle
2300
x1592
585C
Alice, Bob, Oranges and Apples
number theory
2400
x971
584E
Anton and Ira
constructive algorithms
,
greedy
,
math
2300
x1414
582C
Superior Periodic Subarrays
number theory
2400
x734
581F
Zublicanes and Mumocrates
dp
,
trees
,
two pointers
2400
x857
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1997
578C
Weakness and Poorness
ternary search
2000
x4355
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2100
x3274
576B
Invariance of Tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2100
x1789
575G
Run for beer
dfs and similar
,
shortest paths
2200
x868
575F
Bulbo
dp
,
greedy
2100
x990
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1050
573C
Bear and Drawing
constructive algorithms
,
dfs and similar
,
trees
2300
x959
571C
CNF 2
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x613
571B
Minimization
dp
,
greedy
,
sortings
2000
x2547
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2213
570E
Pig and Palindromes
combinatorics
,
dp
2300
x1837
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6839
567F
Mausoleum
dp
2400
x573
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1680
566G
Max and Min
geometry
2500
x334
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x879
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6300
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5807
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1118
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1071
←
1
2
...
15
16
17
18
19
...
23
24
→
User lists
Name