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Codeforces Round 1101 (Div. 2)
01:22:55
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Difficulty:
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constructive algorithms
combine-tags-by-or
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
1352G
Special Permutation
constructive algorithms
1600
x24923
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x19577
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x45080
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x120
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8967
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x9359
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x15536
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x27610
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6359
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1407
1343B
Balanced Array
constructive algorithms
,
math
800
x65503
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6370
1342B
Binary Period
constructive algorithms
,
strings
1100
x24628
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x1073
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x28407
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1140
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3449
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x9568
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x43066
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x532
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x29550
1335B
Construct the String
constructive algorithms
900
x42710
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7755
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x17981
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1822
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x4135
1333A
Little Artem
constructive algorithms
1000
x25958
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x4324
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8451
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x19182
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x537
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1806
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9683
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x14561
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x14100
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x32723
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x2369
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x13656
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x17323
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x46443
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x4659
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x10572
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3547
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x7601
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11731
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x7013
1312B
Bogosort
constructive algorithms
,
sortings
1000
x39643
1311E
Construct the Binary Tree
brute force
,
constructive algorithms
,
trees
2200
x2731
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3274
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x5372
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x12496
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x14654
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6693
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x18764
1302B
DAG
constructive algorithms
x156
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x4245
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x3098
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x8224
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x466
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6777
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x954
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x7241
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x651
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x298
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x746
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1581
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x5501
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x2005
1283F
DIY Garland
constructive algorithms
,
greedy
,
trees
2200
x2049
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x14173
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x1223
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x2379
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x109
1278E
Tests for problem D
constructive algorithms
,
dfs and similar
,
divide and conquer
,
trees
2200
x2049
1276E
Four Stones
constructive algorithms
3500
x123
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1790
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x14701
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x318
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2975
1270E
Divide Points
constructive algorithms
,
geometry
,
math
2300
x2750
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4875
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x15054
1270B
Interesting Subarray
constructive algorithms
,
greedy
,
math
1200
x17392
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x9080
1267L
Lexicography
constructive algorithms
,
strings
1800
x3362
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x1069
1267H
Help BerLine
constructive algorithms
3200
x233
1267D
DevOps Best Practices
constructive algorithms
2800
x262
1267C
Cactus Revenge
constructive algorithms
3500
x393
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3877
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x10075
1266B
Dice Tower
constructive algorithms
,
math
1000
x16615
1265A
Beautiful String
constructive algorithms
,
greedy
1000
x15967
1264F
Beautiful Fibonacci Problem
constructive algorithms
,
number theory
3500
x1098
1264E
Beautiful League
constructive algorithms
,
flows
,
graph matchings
2700
x930
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x6057
1256F
Equalizing Two Strings
constructive algorithms
,
sortings
,
strings
2000
x3627
1255C
League of Leesins
constructive algorithms
,
implementation
1600
x7233
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1601
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3425
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