Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 986 (Div. 2)
10:06:05
Register now »
*has extra registration
→ 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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1683
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3280
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4296
1366B
Shuffle
math
,
two pointers
1300
x21264
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x20077
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x28347
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9538
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27896
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8186
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10710
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x31205
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20710
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12748
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x38652
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6117
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11408
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8386
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10891
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4275
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12635
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1688
1326E
Bombs
data structures
,
two pointers
2400
x2188
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x28661
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x553
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x917
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11791
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6348
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x16465
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x5493
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1848
1282C
Petya and Exam
greedy
,
sortings
,
two pointers
1800
x4325
1272F
Two Bracket Sequences
dp
,
strings
,
two pointers
2200
x1979
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3649
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12735
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7607
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x16038
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3190
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4683
1252E
Songwriter
greedy
,
two pointers
2200
x1244
1251C
Minimize The Integer
greedy
,
two pointers
1600
x12505
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x19723
1250G
Discarding Game
dp
,
greedy
,
two pointers
2300
x723
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5232
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x16251
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10748
1223D
Sequence Sorting
dp
,
greedy
,
two pointers
2000
x4071
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x3255
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10586
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7452
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4142
1198A
MP3
sortings
,
two pointers
1600
x9040
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9753
1195E
OpenStreetMap
data structures
,
two pointers
2100
x3179
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x995
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2290
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9392
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4573
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2408
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x492
1168B
Good Triple
brute force
,
two pointers
1900
x3576
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2693
1166C
A Tale of Two Lands
binary search
,
sortings
,
two pointers
1500
x9647
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x7203
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2656
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x3075
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x6127
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1682
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7512
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x5560
1133C
Balanced Team
sortings
,
two pointers
1200
x23370
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x440
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1643
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x10007
1073C
Vasya and Robot
binary search
,
two pointers
1800
x4804
1066B
Heaters
greedy
,
two pointers
1500
x8365
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4905
1044A
The Tower is Going Home
binary search
,
two pointers
1700
x2910
1043D
Mysterious Crime
brute force
,
combinatorics
,
math
,
meet-in-the-middle
,
two pointers
1700
x4461
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x6272
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x6002
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9520
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x9311
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x454
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x12183
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x21398
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x517
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3675
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25850
965D
Single-use Stones
binary search
,
flows
,
greedy
,
two pointers
1900
x3098
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x21168
958F2
Lightsabers (medium)
binary search
,
two pointers
1800
x1238
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x2164
939E
Maximize!
binary search
,
greedy
,
ternary search
,
two pointers
1800
x3141
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4638
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5293
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9236
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1597
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1185
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x3085
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3547
←
1
2
3
4
5
6
→
User lists
Name