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Before contest
Codeforces Round 941 (Div. 1)
4 days
Before contest
Codeforces Round 941 (Div. 2)
4 days
→ Filter Problems
Difficulty:
—
probabilities
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
1578G
Game of Chance
math
,
probabilities
3500
x32
1761G
Centroid Guess
interactive
,
probabilities
,
trees
3500
x95
1477F
Nezzar and Chocolate Bars
combinatorics
,
fft
,
math
,
probabilities
3500
x121
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x180
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x199
1190F
Tokitsukaze and Powers
number theory
,
probabilities
3400
x87
913H
Don't Exceed
math
,
probabilities
3400
x123
949F
Astronomy
geometry
,
probabilities
3300
x57
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x216
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x312
1556H
DIY Tree
graphs
,
greedy
,
math
,
probabilities
3300
x319
1210F2
Marek and Matching (hard version)
brute force
,
probabilities
3200
x187
1819E
Roads in E City
interactive
,
math
,
probabilities
,
trees
3200
x241
1081G
Mergesort Strikes Back
math
,
probabilities
3200
x338
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x528
1349D
Slime and Biscuits
math
,
probabilities
3200
x798
1912F
Fugitive Frenzy
math
,
probabilities
3100
x104
1210F1
Marek and Matching (easy version)
brute force
,
probabilities
3100
x186
1951G
Clacking Balls
combinatorics
,
math
,
probabilities
3100
x211
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x297
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x351
1924E
Paper Cutting Again
combinatorics
,
probabilities
3100
x382
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x554
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x52
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x167
1526F
Median Queries
constructive algorithms
,
interactive
,
probabilities
3000
x251
303E
Random Ranking
dp
,
math
,
probabilities
3000
x310
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x555
1438F
Olha and Igor
interactive
,
probabilities
,
trees
3000
x607
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x623
1267G
Game Relics
math
,
probabilities
3000
x624
1392H
ZS Shuffles Cards
combinatorics
,
dp
,
math
,
probabilities
3000
x667
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2042
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x44
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x311
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x312
1562F
Tubular Bells
interactive
,
math
,
number theory
,
probabilities
2900
x373
1630E
Expected Components
combinatorics
,
math
,
number theory
,
probabilities
2900
x419
1705F
Mark and the Online Exam
bitmasks
,
constructive algorithms
,
interactive
,
probabilities
2900
x570
1198F
GCD Groups 2
greedy
,
number theory
,
probabilities
2900
x813
1264D2
Beautiful Bracket Sequence (hard version)
combinatorics
,
probabilities
2900
x840
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x949
364D
Ghd
brute force
,
math
,
probabilities
2900
x1949
802F
Marmots (hard)
math
,
probabilities
2800
x120
335E
Counting Skyscrapers
dp
,
math
,
probabilities
2800
x216
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x318
277D
Google Code Jam
dp
,
probabilities
2800
x324
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x336
446D
DZY Loves Games
math
,
matrices
,
probabilities
2800
x378
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x422
1316F
Battalion Strength
data structures
,
divide and conquer
,
probabilities
2800
x507
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x602
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x642
1626F
A Random Code Problem
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2800
x700
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x913
1746F
Kazaee
data structures
,
hashing
,
probabilities
2800
x1491
107E
Darts
geometry
,
probabilities
2700
x127
989E
A Trance of Nightfall
dp
,
geometry
,
matrices
,
probabilities
2700
x228
293D
Ksusha and Square
geometry
,
math
,
probabilities
,
two pointers
2700
x233
457D
Bingo!
combinatorics
,
math
,
probabilities
2700
x267
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x390
1578M
The Mind
constructive algorithms
,
interactive
,
probabilities
2700
x436
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x442
1510I
Is It Rated?
greedy
,
interactive
,
math
,
probabilities
2700
x445
623D
Birthday
greedy
,
math
,
probabilities
2700
x466
643E
Bear and Destroying Subtrees
dp
,
math
,
probabilities
,
trees
2700
x579
113D
Museum
math
,
matrices
,
probabilities
2700
x648
464D
World of Darkraft - 2
dp
,
probabilities
2700
x655
1295F
Good Contest
combinatorics
,
dp
,
probabilities
2700
x997
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1108
1254D
Tree Queries
data structures
,
probabilities
,
trees
2700
x1121
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1315
1765C
Card Guessing
combinatorics
,
dp
,
probabilities
2600
x363
1765G
Guess the String
constructive algorithms
,
interactive
,
probabilities
2600
x365
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x449
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x559
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x718
1172C2
Nauuo and Pictures (hard version)
dp
,
probabilities
2600
x722
1530F
Bingo
bitmasks
,
combinatorics
,
dp
,
math
,
probabilities
2600
x746
1153F
Serval and Bonus Problem
combinatorics
,
dp
,
math
,
probabilities
2600
x750
1380G
Circular Dungeon
greedy
,
math
,
probabilities
2600
x763
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x766
494C
Helping People
dp
,
probabilities
2600
x828
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x869
1835C
Twin Clusters
bitmasks
,
brute force
,
constructive algorithms
,
math
,
probabilities
2600
x928
1264D1
Beautiful Bracket Sequence (easy version)
combinatorics
,
dp
,
probabilities
2600
x1167
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1208
1523E
Crypto Lights
combinatorics
,
dp
,
math
,
probabilities
2600
x1522
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1708
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3120
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x122
68D
Half-decay tree
data structures
,
divide and conquer
,
dp
,
math
,
probabilities
2500
x446
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x599
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x689
1187F
Expected Square Beauty
dp
,
math
,
probabilities
2500
x834
1096E
The Top Scorer
combinatorics
,
dp
,
math
,
probabilities
2500
x859
1737E
Ela Goes Hiking
combinatorics
,
dp
,
math
,
probabilities
2500
x884
1840G2
In Search of Truth (Hard Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2500
x889
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x951
1948F
Rare Coins
combinatorics
,
math
,
probabilities
2500
x1048
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