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Codeforces Round 988 (Div. 3)
39:04:41
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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
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x92
1349D
Slime and Biscuits
math
,
probabilities
3200
x909
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4543
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8197
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x17300
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x821
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2243
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8907
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14679
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25506
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
x380
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x506
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x608
1346B
Boot Camp
*special problem
,
greedy
1400
x1210
1344F
Piet's Palette
matrices
3200
x455
1344E
Train Tracks
data structures
,
trees
3100
x461
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1169
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1863
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6076
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15696
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1272
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x5220
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12756
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x766
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x3111
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6125
1342C
Yet Another Counting Problem
math
,
number theory
1600
x14088
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x508
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x53
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x995
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2254
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7873
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13430
1338E
JYPnation
graphs
3500
x245
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1023
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3231
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8508
1338A
Powered Addition
greedy
,
math
1500
x24295
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x220
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x307
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x691
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x476
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x3621
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11415
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x20593
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x2195
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8388
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10895
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x374
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1323
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2850
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7340
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16727
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4281
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1704
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3949
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12640
1332G
No Monotone Triples
data structures
3100
x301
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x1018
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3871
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8198
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x16799
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17671
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x14081
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x185
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x401
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1715
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6714
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9180
1328F
Make k Equal
greedy
2200
x3256
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x9715
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x13283
1327G
Letters and Question Marks
bitmasks
,
dp
,
string suffix structures
2800
x428
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1695
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8993
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3291
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13454
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x81
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x486
1326F1
Wise Men (Easy Version)
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2600
x846
1326E
Bombs
data structures
,
two pointers
2400
x2193
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x10248
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x12159
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x2000
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x2072
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x12180
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x13775
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x10172
1324E
Sleeping Schedule
dp
,
implementation
1700
x13715
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x28722
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x9090
1322F
Assigning Fares
dp
,
trees
3500
x102
1322E
Median Mountain Range
data structures
3300
x304
1322D
Reality Show
bitmasks
,
dp
2800
x756
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2442
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x4250
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