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Codeforces Round 973 (Div. 2)
29:23:59
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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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Problems
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Status
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Custom test
Problems
#
Name
1031A
Golden Plate
implementation
,
math
800
x12839
1030C
Vasya and Golden Ticket
implementation
1300
x9420
1030A
In Search of an Easy Problem
implementation
800
x129047
1029D
Concatenated Multiples
implementation
,
math
1900
x3849
1029A
Many Equal Substrings
implementation
,
strings
1300
x12268
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4568
1028A
Find Square
implementation
800
x10757
1027B
Numbers on the Chessboard
implementation
,
math
1200
x8343
1027A
Palindromic Twist
implementation
,
strings
1000
x16206
1025E
Colored Cubes
constructive algorithms
,
implementation
,
matrices
2700
x565
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x6109
1025A
Doggo Recoloring
implementation
,
sortings
900
x15053
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8661
1017B
The Bits
implementation
,
math
1200
x9122
1017A
The Rank
implementation
800
x20356
1016C
Vasya And The Mushrooms
dp
,
implementation
1800
x3689
1016B
Segment Occurrences
brute force
,
implementation
1300
x9409
1016A
Death Note
greedy
,
implementation
,
math
900
x14865
1015B
Obtaining the String
implementation
1200
x11541
1015A
Points in Segments
implementation
800
x20884
1012F
Passports
dp
,
implementation
3400
x157
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6417
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x10046
1011A
Stages
greedy
,
implementation
,
sortings
900
x12143
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2375
1009B
Minimum Ternary String
greedy
,
implementation
1400
x10067
1009A
Game Shopping
implementation
800
x11726
1008A
Romaji
implementation
,
strings
900
x14987
1006D
Two Strings Swaps
implementation
1700
x5974
1006B
Polycarp's Practice
greedy
,
implementation
,
sortings
1200
x13187
1006A
Adjacent Replacements
implementation
800
x21529
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11597
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x23301
1005A
Tanya and Stairways
implementation
800
x23531
1004D
Sonya and Matrix
brute force
,
constructive algorithms
,
implementation
2300
x1420
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7524
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9480
1004A
Sonya and Hotels
implementation
900
x11184
1003C
Intense Heat
brute force
,
implementation
,
math
1300
x10559
1003A
Polycarp's Pockets
implementation
800
x27035
1000C
Covered Points Count
data structures
,
implementation
,
sortings
1700
x6713
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8724
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4344
999C
Alphabetic Removals
implementation
1200
x18127
999B
Reversing Encryption
implementation
900
x17486
999A
Mishka and Contest
brute force
,
implementation
800
x22847
998A
Balloons
constructive algorithms
,
implementation
1000
x9484
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8294
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7075
995A
Tesla
constructive algorithms
,
implementation
2100
x1688
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5632
994A
Fingerprints
implementation
800
x14090
993A
Two Squares
geometry
,
implementation
1600
x4134
992D
Nastya and a Game
brute force
,
implementation
,
math
2100
x1644
992A
Nastya and an Array
implementation
,
sortings
800
x13052
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x303
991C
Candies
binary search
,
implementation
1500
x10352
991A
If at first you don't succeed...
implementation
1000
x10551
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x3795
990C
Bracket Sequences Concatenation Problem
implementation
1500
x5887
990A
Commentary Boxes
implementation
,
math
1000
x10549
989A
A Blend of Springtime
implementation
,
strings
900
x10284
988C
Equal Sums
implementation
,
sortings
1400
x10148
988A
Diverse Team
brute force
,
implementation
800
x24823
987C
Three displays
brute force
,
dp
,
implementation
1400
x13433
987A
Infinity Gauntlet
implementation
800
x16512
985B
Switches and Lamps
implementation
1200
x7385
985A
Chess Placing
implementation
1100
x8123
984B
Minesweeper
implementation
1100
x7344
983A
Finite or not?
implementation
,
math
1700
x4536
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8270
981C
Useful Decomposition
implementation
,
trees
1400
x5374
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9250
980A
Links and Pearls
implementation
,
math
900
x10405
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4337
978F
Mentors
binary search
,
data structures
,
implementation
1500
x8244
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8692
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25402
978A
Remove Duplicates
implementation
800
x26950
977B
Two-gram
implementation
,
strings
900
x38919
977A
Wrong Subtraction
implementation
800
x165487
976D
Degree Set
constructive algorithms
,
graphs
,
implementation
2500
x679
976C
Nested Segments
greedy
,
implementation
,
sortings
1500
x6834
976B
Lara Croft and the New Game
implementation
,
math
1300
x5711
976A
Minimum Binary Number
implementation
800
x10519
975B
Mancala
brute force
,
implementation
1100
x6821
975A
Aramic script
implementation
,
strings
900
x9214
967A
Mind the Gap
implementation
1100
x4358
965B
Battleship
implementation
1300
x4550
962D
Merge Equals
data structures
,
implementation
1600
x6833
962C
Make a Square
brute force
,
implementation
,
math
1400
x7812
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7660
962A
Equator
implementation
1300
x12767
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5289
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x20690
961A
Tetris
implementation
900
x10028
960D
Full Binary Tree Queries
brute force
,
implementation
,
trees
2100
x1880
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3920
960A
Check the string
implementation
1200
x8163
959E
Mahmoud and Ehab and the xor-MST
bitmasks
,
dp
,
graphs
,
implementation
,
math
1900
x3389
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