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Before contest
Codeforces Round 941 (Div. 1)
17:14:49
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
17:14:47
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→ Filter Problems
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probabilities
combine-tags-by-or
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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
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strings
ternary search
trees
two pointers
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Problems
#
Name
1556F
Sports Betting
bitmasks
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
2500
x1158
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1388
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2337
840D
Destiny
data structures
,
probabilities
2500
x2761
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x289
717H
Pokermon League challenge
math
,
probabilities
2400
x417
662A
Gambling Nim
bitmasks
,
math
,
matrices
,
probabilities
2400
x429
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x567
513G2
Inversions problem
dp
,
probabilities
2400
x626
441E
Valera and Number
bitmasks
,
dp
,
math
,
probabilities
2400
x670
1061F
Lost Root
interactive
,
probabilities
2400
x682
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x684
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x745
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x766
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x965
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1025
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1046
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1120
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1147
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1273
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1291
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1723
24D
Broken robot
dp
,
math
,
probabilities
2400
x1786
1523D
Love-Hate
bitmasks
,
brute force
,
dp
,
probabilities
2400
x2075
1600F
Party Organization
brute force
,
math
,
probabilities
2300
x432
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x671
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x672
895E
Eyes Closed
data structures
,
probabilities
2300
x907
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x966
1172C1
Nauuo and Pictures (easy version)
dp
,
probabilities
2300
x984
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x998
444B
DZY Loves FFT
probabilities
2300
x1033
1245E
Hyakugoku and Ladders
dp
,
probabilities
,
shortest paths
2300
x1107
1151F
Sonya and Informatics
combinatorics
,
dp
,
matrices
,
probabilities
2300
x1139
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1239
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1285
1310D
Tourism
dp
,
graphs
,
probabilities
2300
x1286
1156F
Card Bag
dp
,
math
,
probabilities
2300
x1326
1623D
Robot Cleaner Revisit
implementation
,
math
,
probabilities
2300
x1347
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1407
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1493
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1563
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1681
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1807
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1973
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2479
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2483
98B
Help King
implementation
,
probabilities
,
trees
2200
x114
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x521
1765F
Chemistry Lab
dp
,
geometry
,
probabilities
2200
x586
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x625
1045D
Interstellar battle
math
,
probabilities
,
trees
2200
x627
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x729
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x844
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x981
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1530
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x1896
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2212
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2240
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2558
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2754
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2771
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x3462
50D
Bombing
binary search
,
dp
,
probabilities
2100
x596
859D
Third Month Insanity
dp
,
probabilities
,
trees
2100
x848
268E
Playlist
math
,
probabilities
,
sortings
2100
x972
452C
Magic Trick
combinatorics
,
math
,
probabilities
2100
x1395
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1935
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1959
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2275
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2459
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2531
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3317
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1076
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1193
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1242
513C
Second price auction
bitmasks
,
probabilities
2000
x1516
1599C
Bubble Strike
combinatorics
,
math
,
probabilities
,
ternary search
2000
x1549
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2132
1612E
Messages
brute force
,
dp
,
greedy
,
probabilities
,
sortings
2000
x2387
1009E
Intercity Travelling
combinatorics
,
math
,
probabilities
2000
x2882
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3323
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3535
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4146
109B
Lucky Probability
brute force
,
probabilities
1900
x1320
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1356
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1360
1773A
Amazing Trick
constructive algorithms
,
graph matchings
,
math
,
probabilities
1900
x1477
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2271
935D
Fafa and Ancient Alphabet
math
,
probabilities
1900
x2513
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3186
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3199
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4072
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x4605
540D
Bad Luck Island
dp
,
probabilities
1900
x5153
1543C
Need for Pink Slips
bitmasks
,
brute force
,
dfs and similar
,
implementation
,
math
,
probabilities
1900
x5179
105B
Dark Assembly
brute force
,
probabilities
1800
x796
30C
Shooting Gallery
dp
,
probabilities
1800
x1847
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2086
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2199
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