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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:
—
two pointers
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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Custom test
Problems
#
Name
1251C
Minimize The Integer
greedy
,
two pointers
1600
x11625
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x18764
1250G
Discarding Game
dp
,
greedy
,
two pointers
2300
x707
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x4783
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14607
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10065
1223D
Sequence Sorting
dp
,
greedy
,
two pointers
2000
x3923
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x2854
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10049
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7011
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x3904
1198A
MP3
sortings
,
two pointers
1600
x8733
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9294
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2796
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x964
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2208
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9106
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4204
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2016
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x428
1168B
Good Triple
brute force
,
two pointers
1900
x3304
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2387
1166C
A Tale of Two Lands
binary search
,
sortings
,
two pointers
1500
x8954
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6721
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2500
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x2737
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5828
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1654
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7142
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x5127
1133C
Balanced Team
sortings
,
two pointers
1200
x21187
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x399
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1617
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9638
1073C
Vasya and Robot
binary search
,
two pointers
1800
x4542
1066B
Heaters
greedy
,
two pointers
1500
x8051
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4799
1044A
The Tower is Going Home
binary search
,
two pointers
1700
x2845
1043D
Mysterious Crime
brute force
,
combinatorics
,
math
,
meet-in-the-middle
,
two pointers
1700
x4365
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x5702
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x5786
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9225
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x8942
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x431
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11971
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20108
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x503
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3227
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24235
965D
Single-use Stones
binary search
,
flows
,
greedy
,
two pointers
1900
x2957
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19095
958F2
Lightsabers (medium)
binary search
,
two pointers
1800
x1197
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x1893
939E
Maximize!
binary search
,
greedy
,
ternary search
,
two pointers
1800
x2994
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4550
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5041
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x8980
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1469
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1130
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2728
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3415
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8651
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8046
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x471
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5113
873C
Strange Game On Matrix
greedy
,
two pointers
1600
x3205
853B
Jury Meeting
greedy
,
sortings
,
two pointers
1800
x2503
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1813
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2199
842A
Kirill And The Game
brute force
,
two pointers
1200
x9954
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4470
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1180
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x1863
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6287
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x910
788A
Functions again
dp
,
two pointers
1600
x8946
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x116
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6271
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x78
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3231
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2187
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2351
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7454
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5906
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1440
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x722
744E
Hongcow Masters the Cyclic Shift
strings
,
two pointers
3200
x132
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5282
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x858
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3294
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x469
716B
Complete the Word
greedy
,
two pointers
1300
x11782
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x12944
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13625
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x119
682E
Alyona and Triangles
geometry
,
two pointers
2600
x645
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x17986
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x575
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9016
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