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Codeforces Round 968 (Div. 2)
11:11:53
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Difficulty:
—
implementation
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
1263E
Editor
data structures
,
implementation
2100
x2767
1263B
PIN Codes
greedy
,
implementation
1400
x11326
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15874
1255C
League of Leesins
constructive algorithms
,
implementation
1600
x6688
1255B
Fridge Lockers
graphs
,
implementation
1100
x11913
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x5166
1253B
Silly Mistake
greedy
,
implementation
1400
x11160
1253A
Single Push
implementation
1000
x17998
1252H
Twin Buildings
greedy
,
implementation
1800
x2620
1252C
Even Path
data structures
,
implementation
1600
x3705
1250F
Data Center
brute force
,
implementation
800
x7249
1250E
The Coronation
graphs
,
implementation
2300
x809
1250A
Berstagram
implementation
1400
x4065
1249C1
Good Numbers (easy version)
brute force
,
greedy
,
implementation
1300
x15455
1248D1
The World Is Just a Programming Task (Easy Version)
brute force
,
dp
,
greedy
,
implementation
2000
x2374
1244F
Chips
constructive algorithms
,
implementation
2300
x1522
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7506
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15672
1243A
Maximum Square
implementation
800
x15606
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x265
1239E
Turtle
dp
,
implementation
3100
x932
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1331
1239B
The World Is Just a Programming Task (Hard Version)
implementation
2500
x1037
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x4156
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4296
1237A
Balanced Rating Changes
implementation
,
math
1000
x19530
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1661
1236C
Labs
constructive algorithms
,
greedy
,
implementation
1300
x10097
1234C
Pipes
dp
,
implementation
1500
x12521
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16826
1234B1
Social Network (easy version)
implementation
1000
x18682
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18616
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21431
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x435
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x5183
1228B
Filling the Grid
implementation
,
math
1400
x11496
1228A
Distinct Digits
brute force
,
implementation
800
x21534
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10460
1225B1
TV Subscriptions (Easy Version)
implementation
1000
x11847
1220A
Cards
implementation
,
sortings
,
strings
800
x29505
1219G
Harvester
implementation
2000
x647
1219C
Periodic integer number
implementation
,
strings
1700
x1774
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1862
1216B
Shooting
greedy
,
implementation
,
sortings
900
x18306
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x12764
1215A
Yellow Cards
greedy
,
implementation
,
math
1000
x11501
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2565
1213D1
Equalizing by Division (easy version)
brute force
,
implementation
1500
x11340
1213B
Bad Prices
data structures
,
implementation
1100
x26369
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x122
1211B
Traveling Around the Golden Ring of Berland
*special problem
,
implementation
1500
x760
1211A
Three Problems
*special problem
,
implementation
1000
x1391
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x3173
1209C
Paint the Digits
constructive algorithms
,
greedy
,
implementation
1500
x7470
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x8140
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12170
1208H
Red Blue Tree
data structures
,
implementation
,
trees
3500
x148
1208E
Let Them Slide
data structures
,
implementation
2200
x2028
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4862
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10321
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x5153
1207B
Square Filling
constructive algorithms
,
greedy
,
implementation
1200
x13213
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21671
1206B
Make Product Equal One
dp
,
implementation
900
x26715
1205C
Palindromic Paths
implementation
,
interactive
2400
x1156
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7290
1203D1
Remove the Substring (easy version)
greedy
,
implementation
1600
x8705
1203C
Common Divisors
implementation
,
math
1300
x20358
1203A
Circle of Students
implementation
1000
x16655
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x391
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2520
1201D
Treasure Hunting
binary search
,
dp
,
greedy
,
implementation
2100
x2342
1201A
Important Exam
implementation
,
strings
900
x15537
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1066
1200E
Compress Words
brute force
,
hashing
,
implementation
,
string suffix structures
,
strings
2000
x7547
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4110
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20258
1199A
City Day
implementation
1000
x14668
1197B
Pillars
greedy
,
implementation
1000
x13757
1196E
Connected Component on a Chessboard
constructive algorithms
,
implementation
1800
x3716
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9673
1196D1
RGB Substring (easy version)
implementation
1500
x10485
1196C
Robot Breakout
implementation
1500
x9303
1194C
From S To T
implementation
,
strings
1300
x13102
1194B
Yet Another Crosses Problem
implementation
1300
x10279
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9583
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9333
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10531
1188A2
Add on a Tree: Revolution
constructive algorithms
,
dfs and similar
,
implementation
,
trees
2500
x1224
1187C
Vasya And Array
constructive algorithms
,
greedy
,
implementation
1800
x6320
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x12146
1186F
Vus the Cossack and a Graph
dfs and similar
,
graphs
,
greedy
,
implementation
2400
x777
1186E
Vus the Cossack and a Field
divide and conquer
,
implementation
,
math
2500
x619
1186C
Vus the Cossack and Strings
implementation
,
math
1800
x6064
1186A
Vus the Cossack and a Contest
implementation
800
x37105
1185E
Polycarp and Snakes
brute force
,
implementation
2000
x2644
1185D
Extra Element
implementation
,
math
1700
x6695
1185B
Email from Polycarp
implementation
,
strings
1200
x13306
1184D1
Parallel Universes (Easy)
implementation
1600
x2515
1184C1
Heidi and the Turing Test (Easy)
implementation
1600
x2287
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