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Before contest
Codeforces Round 987 (Div. 2)
11:09:26
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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
Standings
Custom test
Problems
#
Name
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14729
1106A
Lunar New Year and Cross Counting
implementation
800
x12364
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15439
1102A
Integer Sequence Dividing
math
800
x24506
1101A
Minimum Integer
math
1000
x17490
1100A
Roman and Browser
implementation
1000
x10176
1099A
Snowball
implementation
800
x12934
1097A
Gennady and a Card Game
brute force
,
implementation
800
x39112
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18804
1095B
Array Stabilization
implementation
900
x22191
1095A
Repeating Cipher
implementation
800
x31910
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16592
1093A
Dice Rolling
math
800
x17742
1092B
Teams Forming
sortings
800
x26590
1092A
Uniform String
implementation
800
x16326
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17645
1090M
The Pleasant Walk
implementation
1000
x6359
1089L
Lazyland
900
x4021
1088B
Ehab and subtraction
implementation
,
sortings
1000
x12639
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x16892
1085A
Right-Left Cipher
implementation
,
strings
800
x12197
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x7938
1081A
Definite Game
constructive algorithms
,
math
800
x12110
1080B
Margarite and the best present
math
900
x11840
1080A
Petya and Origami
math
800
x18220
1077B
Disturbed People
greedy
1000
x19080
1077A
Frog Jumping
math
800
x30117
1075A
The King's Race
implementation
,
math
800
x8564
1073B
Vasya and Books
implementation
,
math
1000
x10599
1073A
Diverse Substring
implementation
,
strings
1000
x15595
1065A
Vasya and Chocolate
implementation
,
math
800
x14688
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x22616
1061A
Coins
greedy
,
implementation
,
math
800
x22069
1060A
Phone Numbers
brute force
800
x14249
1059A
Cashier
implementation
1000
x12889
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x6172
1056A
Determine Line
implementation
800
x6673
1055A
Metro
graphs
900
x10769
1054B
Appending Mex
implementation
1000
x6608
1054A
Elevator or Stairs?
implementation
800
x9101
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x17225
1047B
Cover Points
geometry
,
math
900
x17301
1047A
Little C Loves 3 I
math
800
x19992
1043A
Elections
implementation
,
math
800
x10819
1041B
Buying a TV Set
math
1000
x14061
1041A
Heist
greedy
,
implementation
,
sortings
800
x25221
1040A
Palindrome Dance
greedy
1000
x9582
1038A
Equality
implementation
,
strings
800
x14962
1036A
Function Height
math
1000
x10177
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x13792
1032A
Kitchen Utensils
900
x6872
1031A
Golden Plate
implementation
,
math
800
x12912
1030A
In Search of an Easy Problem
implementation
800
x134093
1028A
Find Square
implementation
800
x10904
1027A
Palindromic Twist
implementation
,
strings
1000
x16408
1025A
Doggo Recoloring
implementation
,
sortings
900
x15208
1023B
Pair of Toys
math
1000
x10867
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x21448
1020A
New Building for SIS
math
1000
x9007
1017A
The Rank
implementation
800
x20559
1016A
Death Note
greedy
,
implementation
,
math
900
x14943
1015A
Points in Segments
implementation
800
x21054
1013A
Piles With Stones
math
800
x10980
1011A
Stages
greedy
,
implementation
,
sortings
900
x12262
1009A
Game Shopping
implementation
800
x11824
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11463
1008A
Romaji
implementation
,
strings
900
x15130
1006A
Adjacent Replacements
implementation
800
x21669
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x23648
1005A
Tanya and Stairways
implementation
800
x23864
1004A
Sonya and Hotels
implementation
900
x11243
1003A
Polycarp's Pockets
implementation
800
x27287
1002A1
Generate superposition of all basis states
800
x845
999B
Reversing Encryption
implementation
900
x17660
999A
Mishka and Contest
brute force
,
implementation
800
x23148
998A
Balloons
constructive algorithms
,
implementation
1000
x9628
996A
Hit the Lottery
dp
,
greedy
800
x92374
994A
Fingerprints
implementation
800
x14215
992A
Nastya and an Array
implementation
,
sortings
800
x13181
991B
Getting an A
greedy
,
sortings
900
x12661
991A
If at first you don't succeed...
implementation
1000
x10641
990A
Commentary Boxes
implementation
,
math
1000
x10617
989A
A Blend of Springtime
implementation
,
strings
900
x10389
988A
Diverse Team
brute force
,
implementation
800
x25209
987A
Infinity Gauntlet
implementation
800
x16629
984A
Game
sortings
800
x19522
981B
Businessmen Problems
sortings
1000
x6989
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9414
980A
Links and Pearls
implementation
,
math
900
x10441
979A
Pizza, Pizza, Pizza!!!
math
1000
x13846
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25871
978B
File Name
greedy
,
strings
800
x36601
978A
Remove Duplicates
implementation
800
x27322
977B
Two-gram
implementation
,
strings
900
x39995
977A
Wrong Subtraction
implementation
800
x170661
976A
Minimum Binary Number
implementation
800
x10557
975A
Aramic script
implementation
,
strings
900
x9327
967B
Watering System
math
,
sortings
1000
x7184
965A
Paper Airplanes
math
800
x9572
964A
Splits
math
800
x9711
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