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Codeforces Round (Div. 2)
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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
#
Name
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x17127
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20531
1352D
Alice, Bob and Candies
implementation
1300
x26170
1352C
K-th Not Divisible by n
binary search
,
math
1200
x54434
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x37609
1352A
Sum of Round Numbers
implementation
,
math
800
x79290
1351C
Skier
data structures
,
implementation
1400
x8549
1351B
Square?
brute force
,
implementation
,
math
900
x16988
1351A
A+B (Trial Problem)
implementation
800
x23876
1350B
Orac and Models
dp
,
math
,
number theory
1400
x22149
1350A
Orac and Factors
math
900
x26083
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x112
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x412
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x92
1349D
Slime and Biscuits
math
,
probabilities
3200
x903
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4522
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8152
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x17078
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x812
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2228
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8850
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14616
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25332
1348A
Phoenix and Balance
greedy
,
math
800
x39503
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x49
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x50
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x135
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x228
1346E
Magic Tricks
*special problem
,
dp
,
graphs
1700
x378
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x502
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x605
1346B
Boot Camp
*special problem
,
greedy
1400
x1206
1346A
Color Revolution
*special problem
,
math
1000
x2032
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x26420
1345A
Puzzle Pieces
math
800
x24168
1344F
Piet's Palette
matrices
3200
x454
1344E
Train Tracks
data structures
,
trees
3100
x459
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1163
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1860
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6058
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15637
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1267
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x5170
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12664
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x38358
1343B
Balanced Array
constructive algorithms
,
math
800
x56462
1343A
Candies
brute force
,
math
900
x47871
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x712
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x3083
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6094
1342C
Yet Another Counting Problem
math
,
number theory
1600
x14031
1342B
Binary Period
constructive algorithms
,
strings
1100
x23688
1342A
Road To Zero
greedy
,
math
1000
x40331
1341B
Nastya and Door
greedy
,
implementation
1300
x19672
1341A
Nastya and Rice
math
900
x29034
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x503
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x53
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x990
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2240
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7851
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13418
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x26385
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x32029
1338E
JYPnation
graphs
3500
x241
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1016
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3219
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8464
1338A
Powered Addition
greedy
,
math
1500
x23973
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x34163
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x38226
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x216
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x304
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x685
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x474
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x3597
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11373
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x20393
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x2187
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8350
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10844
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x27419
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34614
1335B
Construct the String
constructive algorithms
900
x38423
1335A
Candies and Two Sisters
math
800
x84259
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x368
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1311
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2827
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7305
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16604
1334B
Middle Class
greedy
,
sortings
1100
x25854
1334A
Level Statistics
implementation
,
math
1200
x23265
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4262
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1698
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3928
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12577
1333B
Kind Anton
greedy
,
implementation
1100
x21602
1333A
Little Artem
constructive algorithms
1000
x24604
1332G
No Monotone Triples
data structures
3100
x297
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x1001
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3841
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