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Codeforces Round 987 (Div. 2)
04:54:10
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Difficulty:
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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
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Status
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Custom test
Problems
#
Name
1288B
Yet Another Meme Problem
math
1100
x17093
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x18412
1287A
Angry Students
greedy
,
implementation
800
x20679
1285A
Mezo Playing Zoma
math
800
x28375
1284A
New Year and Naming
implementation
,
strings
800
x18028
1283B
Candies Division
math
900
x21784
1283A
Minutes Before the New Year
math
800
x50998
1282A
Temporarily unavailable
implementation
,
math
900
x14895
1281A
Suffix Three
implementation
800
x18021
1279A
New Year Garland
math
900
x16981
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x16823
1277B
Make Them Odd
greedy
,
number theory
1200
x15294
1277A
Happy Birthday, Polycarp!
implementation
1000
x13444
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x26825
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13947
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20762
1271A
Suits
brute force
,
greedy
,
math
800
x14998
1270B
Interesting Subarray
constructive algorithms
,
greedy
,
math
1200
x16446
1270A
Card Game
games
,
greedy
,
math
800
x17004
1269A
Equation
brute force
,
math
800
x21795
1267B
Balls of Buma
900
x4062
1266B
Dice Tower
constructive algorithms
,
math
1000
x15141
1266A
Competitive Programmer
chinese remainder theorem
,
math
1000
x15989
1265A
Beautiful String
constructive algorithms
,
greedy
1000
x15153
1263A
Sweet Problem
math
1100
x16394
1260A
Heating
math
1000
x14831
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x16053
1257B
Magic Stick
math
1000
x21073
1257A
Two Rival Students
greedy
,
math
800
x20638
1256A
Payment Without Change
math
1000
x29590
1255B
Fridge Lockers
graphs
,
implementation
1100
x11984
1255A
Changing Volume
math
800
x17250
1253A
Single Push
implementation
1000
x18103
1252A
Copying Homework
1000
x5658
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x19738
1250F
Data Center
brute force
,
implementation
800
x7421
1249B1
Books Exchange (easy version)
dsu
,
math
1000
x20792
1249A
Yet Another Dividing into Teams
math
800
x22429
1248B
Grow The Tree
greedy
,
math
,
sortings
900
x16944
1248A
Integer Points
geometry
,
math
1000
x14177
1245B
Restricted RPS
constructive algorithms
,
dp
,
greedy
1200
x13878
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x14265
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15908
1244A
Pens and Pencils
math
800
x19298
1243B1
Character Swap (Easy Version)
strings
1000
x14922
1243A
Maximum Square
implementation
800
x15717
1238A
Prime Subtraction
math
,
number theory
900
x24542
1237A
Balanced Rating Changes
implementation
,
math
1000
x20041
1236A
Stones
brute force
,
greedy
,
math
800
x16476
1234B1
Social Network (easy version)
implementation
1000
x18812
1234A
Equalize Prices Again
math
800
x27898
1231C
Increasing Matrix
greedy
1100
x3869
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18773
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21705
1228A
Distinct Digits
brute force
,
implementation
800
x21848
1227B
Box
constructive algorithms
1200
x9698
1227A
Math Problem
math
1100
x9839
1225B1
TV Subscriptions (Easy Version)
implementation
1000
x11936
1225A
Forgetting Things
math
900
x15858
1223B
Strings Equalization
strings
1000
x14979
1223A
CME
math
800
x21655
1221C
Perfect Team
binary search
,
math
1200
x21294
1221B
Knights
constructive algorithms
,
greedy
1100
x11985
1221A
2048 Game
brute force
,
greedy
,
math
1000
x16976
1220A
Cards
implementation
,
sortings
,
strings
800
x29971
1216B
Shooting
greedy
,
implementation
,
sortings
900
x18513
1216A
Prefixes
strings
800
x18736
1215A
Yellow Cards
greedy
,
implementation
,
math
1000
x11594
1214C
Bad Sequence
data structures
,
greedy
1200
x13323
1214B
Badges
brute force
,
math
1100
x10879
1213C
Book Reading
math
1200
x18537
1213B
Bad Prices
data structures
,
implementation
1100
x26890
1213A
Chips Moving
math
900
x24160
1211A
Three Problems
*special problem
,
implementation
1000
x1425
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12239
1208A
XORinacci
math
900
x16866
1207B
Square Filling
constructive algorithms
,
greedy
,
implementation
1200
x13300
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21955
1206B
Make Product Equal One
dp
,
implementation
900
x27040
1206A
Choose Two Numbers
math
,
sortings
800
x24527
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x14190
1204B
Mislove Has Lost an Array
greedy
,
math
900
x17564
1204A
BowWow and the Timetable
math
1000
x20994
1203B
Equal Rectangles
greedy
,
math
1200
x16035
1203A
Circle of Students
implementation
1000
x16729
1202A
You Are Given Two Binary Strings...
bitmasks
,
greedy
1100
x9407
1201A
Important Exam
implementation
,
strings
900
x15755
1200B
Block Adventure
dp
,
greedy
1200
x14012
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20478
1199B
Water Lily
geometry
,
math
1000
x20688
1199A
City Day
implementation
1000
x14946
1197B
Pillars
greedy
,
implementation
1000
x13897
1197A
DIY Wooden Ladder
greedy
,
math
,
sortings
900
x13571
1196B
Odd Sum Segments
constructive algorithms
,
math
1200
x16683
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27821
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19945
1195A
Drinks Choosing
greedy
,
math
1000
x13158
1194A
Remove a Progression
math
800
x16369
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9616
1191A
Tokitsukaze and Enhancement
brute force
800
x18196
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