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Codeforces functionality may be limited from
June 18, 19:00 (UTC)
to
June 19, 3:00 AM (UTC)
due to technical maintenance. Polygon will work as usual.
×
→ Pay attention
Before contest
Codeforces Round 954 (Div. 3)
5 days
→ Filter Problems
Difficulty:
—
greedy
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
Submit
Status
Standings
Custom test
Problems
#
Name
1447B
Numbers Box
greedy
,
math
1000
x15584
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x1241
1446D1
Frequency Problem (Easy Version)
data structures
,
greedy
2600
x1636
1446A
Knapsack
constructive algorithms
,
greedy
,
sortings
1300
x15093
1445B
Elimination
greedy
,
math
900
x15113
1445A
Array Rearrangment
greedy
,
sortings
800
x18878
1443C
The Delivery Dilemma
binary search
,
greedy
,
sortings
1400
x15025
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15586
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x564
1442D
Sum
data structures
,
divide and conquer
,
dp
,
greedy
2800
x1945
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1587
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4334
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8615
1440B
Sum of Medians
greedy
,
math
900
x17777
1439C
Greedy Shopping
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
2600
x1689
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4968
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x18786
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x12396
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x10188
1437B
Reverse Binary Strings
constructive algorithms
,
greedy
1200
x18765
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x17855
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5897
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x26527
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x28081
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x66
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x139
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x155
1431D
Used Markers
*special problem
,
greedy
1500
x448
1430F
Realistic Gameplay
dp
,
greedy
2600
x870
1430E
String Reversal
data structures
,
greedy
,
strings
1900
x6307
1430D
String Deletion
binary search
,
data structures
,
greedy
,
two pointers
1700
x8700
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x23630
1430B
Barrels
greedy
,
implementation
,
sortings
800
x19198
1428G2
Lucky Numbers (Hard Version)
dp
,
greedy
3000
x617
1428G1
Lucky Numbers (Easy Version)
dp
,
greedy
2900
x554
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3544
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4431
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19863
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x310
1427B
Chess Cheater
greedy
,
implementation
,
sortings
1400
x10743
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7280
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x15640
1425E
Excitation of Atoms
greedy
,
implementation
2200
x910
1425A
Arena of Greed
games
,
greedy
1400
x6411
1422E
Minlexes
dp
,
greedy
,
implementation
,
strings
2700
x734
1422B
Nice Matrix
greedy
,
implementation
,
math
1300
x14208
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4065
1421A
XORwice
bitmasks
,
greedy
,
math
800
x27662
1420E
Battle Lemmings
dp
,
greedy
2500
x855
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4545
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x17184
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14939
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x23804
1419C
Killjoy
greedy
,
implementation
,
math
1500
x15044
1419B
Stairs
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x16000
1419A
Digit Game
games
,
greedy
,
implementation
900
x19325
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x18629
1418B
Negative Prefixes
greedy
,
sortings
1300
x16355
1417B
Two Arrays
greedy
,
math
,
sortings
1100
x14362
1417A
Copy-paste
greedy
,
math
800
x18077
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x389
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x279
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4225
1416B
Make Them Equal
constructive algorithms
,
greedy
,
math
2000
x5937
1415E
New Game Plus!
constructive algorithms
,
greedy
,
math
2200
x2604
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x12036
1413E
Solo mid Oracle
greedy
,
math
,
ternary search
2100
x1938
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6375
1411F
The Thorny Path
greedy
,
math
3000
x321
1411E
Poman Numbers
bitmasks
,
greedy
,
math
,
strings
2300
x1565
1411D
Grime Zoo
brute force
,
greedy
,
implementation
,
strings
2100
x2439
1409D
Decrease the Sum of Digits
greedy
,
math
1500
x18852
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28414
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x63482
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x357
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1889
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x9792
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1610
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16741
1406D
Three Sequences
constructive algorithms
,
data structures
,
greedy
,
math
2200
x3399
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22184
1406A
Subset Mex
greedy
,
implementation
,
math
900
x21019
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2534
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8912
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x20769
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x5051
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x16864
1400B
RPG Protagonist
brute force
,
greedy
,
math
1700
x10864
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2229
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5710
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17802
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x28016
1399B
Gifts Fixing
greedy
800
x42665
1399A
Remove Smallest
greedy
,
sortings
800
x63709
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1071
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2183
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x11076
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24154
1397A
Juggling Letters
greedy
,
strings
800
x28228
1396C
Monster Invaders
dp
,
greedy
,
implementation
2300
x2403
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