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Codeforces Round 940 (Div. 2) and CodeCraft-23
3 days
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combine-tags-by-or
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2-sat
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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
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interactive
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Name
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x942
615E
Hexagons
binary search
,
implementation
,
math
2100
x961
730C
Bulmart
binary search
,
dfs and similar
2100
x1003
1070E
Getting Deals Done
binary search
,
data structures
2100
x1189
818F
Level Generation
binary search
,
math
,
ternary search
2100
x1279
862E
Mahmoud and Ehab and the function
binary search
,
data structures
,
sortings
2100
x1386
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1439
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1484
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1491
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1692
549H
Degenerate Matrix
binary search
,
math
2100
x1784
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x1842
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2001
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2022
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2102
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2103
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2126
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2129
1201D
Treasure Hunting
binary search
,
dp
,
greedy
,
implementation
2100
x2145
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2184
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2247
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2272
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2277
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2343
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2350
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2385
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2440
955C
Sad powers
binary search
,
math
,
number theory
2100
x2449
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2541
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2717
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2776
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2909
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3027
689D
Friends and Subsequences
binary search
,
data structures
2100
x3045
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3104
1637E
Best Pair
binary search
,
brute force
,
implementation
2100
x3175
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3220
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3377
1626D
Martial Arts Tournament
binary search
,
brute force
,
greedy
,
math
2100
x3773
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3784
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3819
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3881
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3947
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4071
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4275
1538G
Gift Set
binary search
,
greedy
,
math
,
ternary search
2100
x4339
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4604
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x4700
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6027
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6150
1486D
Max Median
binary search
,
data structures
,
dp
2100
x6621
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6745
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2000
x188
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x222
774L
Bars
*special problem
,
binary search
2000
x321
309A
Morning run
binary search
,
math
,
two pointers
2000
x457
73B
Need For Brake
binary search
,
greedy
,
sortings
2000
x487
131F
Present to Mom
binary search
,
two pointers
2000
x597
248C
Robo-Footballer
binary search
,
geometry
2000
x792
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x841
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x858
163B
Lemmings
binary search
2000
x1042
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1268
382B
Number Busters
binary search
,
math
2000
x1382
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1451
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1513
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1529
862D
Mahmoud and Ehab and the binary string
binary search
,
divide and conquer
,
interactive
2000
x1644
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1752
1165F1
Microtransactions (easy version)
binary search
,
greedy
2000
x1759
954E
Water Taps
binary search
,
greedy
,
sortings
2000
x1793
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x1888
1019B
The hat
binary search
,
interactive
2000
x1890
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1894
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x1998
1165F2
Microtransactions (hard version)
binary search
,
greedy
,
implementation
2000
x2015
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2044
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2136
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2203
1619G
Unusual Minesweeper
binary search
,
dfs and similar
,
dsu
,
greedy
,
sortings
2000
x2253
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2333
1029F
Multicolored Markers
binary search
,
brute force
,
math
,
number theory
2000
x2459
749D
Leaving Auction
binary search
,
data structures
2000
x2469
609D
Gadgets for dollars and pounds
binary search
,
greedy
,
two pointers
2000
x2540
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2613
360B
Levko and Array
binary search
,
dp
2000
x2693
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2887
671B
Robin Hood
binary search
,
greedy
2000
x2961
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3075
1624F
Interacdive Problem
binary search
,
constructive algorithms
,
interactive
2000
x3160
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3160
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3193
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3213
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3340
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3505
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3570
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3629
1551E
Fixed Points
binary search
,
brute force
,
dp
2000
x3662
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3689
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x3778
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