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Refact.ai Match 1 (Codeforces Round 985)
3 days
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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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Custom test
Problems
#
Name
1101A
Minimum Integer
math
1000
x17462
1100A
Roman and Browser
implementation
1000
x10167
1099A
Snowball
implementation
800
x12926
1097A
Gennady and a Card Game
brute force
,
implementation
800
x39045
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18794
1095B
Array Stabilization
implementation
900
x22166
1095A
Repeating Cipher
implementation
800
x31700
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16567
1093A
Dice Rolling
math
800
x17733
1092B
Teams Forming
sortings
800
x26567
1092A
Uniform String
implementation
800
x16296
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17617
1090M
The Pleasant Walk
implementation
1000
x6356
1089L
Lazyland
900
x3999
1088B
Ehab and subtraction
implementation
,
sortings
1000
x12628
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x16875
1085A
Right-Left Cipher
implementation
,
strings
800
x12183
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x7929
1081A
Definite Game
constructive algorithms
,
math
800
x12098
1080B
Margarite and the best present
math
900
x11831
1080A
Petya and Origami
math
800
x18201
1077B
Disturbed People
greedy
1000
x19071
1077A
Frog Jumping
math
800
x30096
1075A
The King's Race
implementation
,
math
800
x8556
1073B
Vasya and Books
implementation
,
math
1000
x10590
1073A
Diverse Substring
implementation
,
strings
1000
x15579
1065A
Vasya and Chocolate
implementation
,
math
800
x14681
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x22585
1061A
Coins
greedy
,
implementation
,
math
800
x22038
1060A
Phone Numbers
brute force
800
x14225
1059A
Cashier
implementation
1000
x12879
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x6145
1056A
Determine Line
implementation
800
x6653
1055A
Metro
graphs
900
x10756
1054B
Appending Mex
implementation
1000
x6603
1054A
Elevator or Stairs?
implementation
800
x9099
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x17206
1047B
Cover Points
geometry
,
math
900
x17268
1047A
Little C Loves 3 I
math
800
x19974
1043A
Elections
implementation
,
math
800
x10816
1041B
Buying a TV Set
math
1000
x14051
1041A
Heist
greedy
,
implementation
,
sortings
800
x25190
1040A
Palindrome Dance
greedy
1000
x9575
1038A
Equality
implementation
,
strings
800
x14947
1036A
Function Height
math
1000
x10176
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x13746
1032A
Kitchen Utensils
900
x6869
1031A
Golden Plate
implementation
,
math
800
x12866
1030A
In Search of an Easy Problem
implementation
800
x133318
1028A
Find Square
implementation
800
x10902
1027A
Palindromic Twist
implementation
,
strings
1000
x16395
1025A
Doggo Recoloring
implementation
,
sortings
900
x15193
1023B
Pair of Toys
math
1000
x10864
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x21368
1020A
New Building for SIS
math
1000
x9003
1017A
The Rank
implementation
800
x20544
1016A
Death Note
greedy
,
implementation
,
math
900
x14934
1015A
Points in Segments
implementation
800
x21032
1013A
Piles With Stones
math
800
x10974
1011A
Stages
greedy
,
implementation
,
sortings
900
x12248
1009A
Game Shopping
implementation
800
x11818
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11432
1008A
Romaji
implementation
,
strings
900
x15096
1006A
Adjacent Replacements
implementation
800
x21659
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x23614
1005A
Tanya and Stairways
implementation
800
x23838
1004A
Sonya and Hotels
implementation
900
x11240
1003A
Polycarp's Pockets
implementation
800
x27222
1002A1
Generate superposition of all basis states
800
x843
999B
Reversing Encryption
implementation
900
x17647
999A
Mishka and Contest
brute force
,
implementation
800
x23124
998A
Balloons
constructive algorithms
,
implementation
1000
x9619
996A
Hit the Lottery
dp
,
greedy
800
x91997
994A
Fingerprints
implementation
800
x14198
992A
Nastya and an Array
implementation
,
sortings
800
x13152
991B
Getting an A
greedy
,
sortings
900
x12654
991A
If at first you don't succeed...
implementation
1000
x10628
990A
Commentary Boxes
implementation
,
math
1000
x10615
989A
A Blend of Springtime
implementation
,
strings
900
x10385
988A
Diverse Team
brute force
,
implementation
800
x25163
987A
Infinity Gauntlet
implementation
800
x16612
984A
Game
sortings
800
x19506
981B
Businessmen Problems
sortings
1000
x6963
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9377
980A
Links and Pearls
implementation
,
math
900
x10429
979A
Pizza, Pizza, Pizza!!!
math
1000
x13829
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25822
978B
File Name
greedy
,
strings
800
x36509
978A
Remove Duplicates
implementation
800
x27261
977B
Two-gram
implementation
,
strings
900
x39870
977A
Wrong Subtraction
implementation
800
x169783
976A
Minimum Binary Number
implementation
800
x10554
975A
Aramic script
implementation
,
strings
900
x9320
967B
Watering System
math
,
sortings
1000
x7171
965A
Paper Airplanes
math
800
x9567
964A
Splits
math
800
x9703
961A
Tetris
implementation
900
x10076
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x47539
958B1
Maximum Control (easy)
implementation
1000
x3436
954A
Diagonal Walking
implementation
800
x10532
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