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Codeforces Round 941 (Div. 1)
3 days
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
3 days
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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
#
Name
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11187
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11483
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11504
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12168
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12182
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12379
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12904
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13464
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16083
207A1
Beaver's Calculator 1.0
greedy
1600
x270
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x331
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x342
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x476
1910B
Security Guard
*special problem
,
greedy
1600
x574
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x578
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x897
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1288
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1296
291D
Parallel Programming
*special problem
,
greedy
1600
x1465
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1467
910B
Door Frames
greedy
,
implementation
1600
x1669
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1716
250C
Movie Critics
greedy
1600
x1873
440B
Balancer
greedy
,
implementation
1600
x1915
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1947
847H
Load Testing
greedy
1600
x2366
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2414
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2442
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2516
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2599
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3093
873C
Strange Game On Matrix
greedy
,
two pointers
1600
x3206
444A
DZY Loves Physics
greedy
,
math
1600
x3365
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3437
269A
Magical Boxes
greedy
,
math
1600
x3470
898D
Alarm Clock
greedy
1600
x3605
333A
Secrets
greedy
1600
x3922
154A
Hometask
greedy
1600
x3976
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4285
825C
Multi-judge Solving
greedy
,
implementation
1600
x4347
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4404
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4482
723C
Polycarp at the Radio
greedy
1600
x4503
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4523
597B
Restaurant
dp
,
greedy
,
sortings
1600
x4629
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4763
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4875
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x4930
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5042
1031C
Cram Time
greedy
1600
x5156
949A
Zebras
greedy
1600
x5176
383A
Milking cows
data structures
,
greedy
1600
x5195
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5284
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5305
1082C
Multi-Subject Competition
greedy
,
sortings
1600
x5499
712C
Memory and De-Evolution
greedy
,
math
1600
x5528
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x5587
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x5590
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5613
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5691
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5738
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5756
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x5773
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x5889
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6117
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6272
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6428
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6483
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x6511
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6531
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x6574
1175C
Electrification
binary search
,
brute force
,
greedy
1600
x6592
1027C
Minimum Value Rectangle
greedy
1600
x6592
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6669
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6765
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6800
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x6896
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x6942
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7005
605A
Sorting Railway Cars
constructive algorithms
,
greedy
1600
x7035
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7083
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7092
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7094
1797C
Li Hua and Chess
constructive algorithms
,
greedy
,
interactive
1600
x7187
1671D
Insert a Progression
brute force
,
constructive algorithms
,
greedy
1600
x7233
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7243
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7292
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7330
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7384
1082B
Vova and Trophies
greedy
1600
x7403
1003D
Coins and Queries
greedy
1600
x7493
1878D
Reverse Madness
data structures
,
greedy
1600
x7521
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7531
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7618
1065C
Make It Equal
greedy
1600
x7630
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7684
1223C
Save the Nature
binary search
,
greedy
1600
x7720
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7733
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x7739
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7748
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