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)
14:14:01
Register now »
*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
429E
Points and Segments
graphs
3000
x839
429D
Tricky Function
data structures
,
divide and conquer
,
geometry
2200
x2692
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x933
427E
Police Patrol
greedy
,
implementation
,
math
,
ternary search
2000
x1411
427D
Match & Catch
dp
,
string suffix structures
,
strings
2200
x2129
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x13479
425E
Sereja and Sets
dp
2500
x596
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1416
425C
Sereja and Two Sequences
data structures
,
dp
2300
x886
425B
Sereja and Table
bitmasks
,
greedy
2200
x1284
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x130
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x558
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x513
420E
Playing the ball
geometry
2600
x214
420D
Cup Trick
data structures
2200
x782
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1234
420B
Online Meeting
implementation
1800
x1012
418E
Tricky Password
data structures
3100
x300
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x474
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x787
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2419
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1399
416D
Population Size
greedy
,
implementation
,
math
2400
x936
414E
Mashmokh's Designed Problem
data structures
3200
x200
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x676
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2185
413E
Maze 2D
data structures
,
divide and conquer
2200
x678
413D
2048
bitmasks
,
dp
2000
x779
412E
E-mail Addresses
implementation
1900
x828
412D
Giving Awards
dfs and similar
2000
x1827
411C
Kicker
implementation
1700
x1218
409I
Feed the Golorp
*special problem
2400
x118
409G
On a plane
*special problem
,
geometry
2200
x507
409F
000001
*special problem
1900
x2059
409E
Dome
*special problem
1800
x564
409D
Big Data
*special problem
1700
x1702
409C
Magnum Opus
*special problem
1700
x1961
409B
Mysterious Language
*special problem
1700
x1350
409A
The Great Game
*special problem
1700
x2449
407E
k-d-sequence
data structures
3100
x697
407D
Largest Submatrix 3
dp
,
hashing
2700
x555
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x962
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x232
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x1142
405E
Graph Cutting
dfs and similar
,
graphs
2300
x1353
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3101
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x571
404D
Minesweeper 1D
dp
,
implementation
1900
x2093
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5094
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x203
403D
Beautiful Pairs of Numbers
combinatorics
,
dp
2300
x1077
402E
Strictly Positive Matrix
graphs
,
math
2200
x2141
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2537
401E
Olympic Games
math
2500
x168
401D
Roman and Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
number theory
2000
x4066
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x938
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2835
388E
Fox and Meteor Shower
geometry
3100
x120
388D
Fox and Perfect Sets
math
2700
x441
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3157
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2455
387E
George and Cards
binary search
,
data structures
2200
x866
387D
George and Interesting Graph
graph matchings
2200
x971
387C
George and Number
greedy
,
implementation
1700
x2174
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x419
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x758
385E
Bear in the Field
math
,
matrices
2300
x565
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x802
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9503
383E
Vowels
combinatorics
,
divide and conquer
,
dp
2700
x2892
383D
Antimatter
dp
2300
x2940
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6255
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x659
382E
Ksenia and Combinatorics
combinatorics
,
dp
2600
x370
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x657
382C
Arithmetic Progression
implementation
,
sortings
1700
x8216
382B
Number Busters
binary search
,
math
2000
x1396
380E
Sereja and Dividing
data structures
2600
x295
380D
Sereja and Cinema
combinatorics
,
math
2500
x459
380C
Sereja and Brackets
data structures
,
schedules
2000
x14305
380B
Sereja and Tree
graphs
,
implementation
2400
x531
379G
New Year Cactus
dp
3100
x141
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2194
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x338
379D
New Year Letter
bitmasks
,
brute force
,
dp
2000
x1524
377E
Cookie Clicker
dp
,
geometry
2800
x447
377D
Developing Game
data structures
2400
x1109
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1113
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x1999
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x404
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6399
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x477
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x179
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x853
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2698
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2853
372E
Drawing Circles is Fun
combinatorics
,
geometry
3000
x170
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x954
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x3949
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2574
←
1
2
...
43
44
45
46
47
...
54
55
→
User lists
Name