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Before contest
Codeforces Round 941 (Div. 1)
24:18:58
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Before contest
Codeforces Round 941 (Div. 2)
24:18:57
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data structures
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2-sat
binary search
bitmasks
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combinatorics
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data structures
dfs and similar
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graph matchings
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Name
689D
Friends and Subsequences
binary search
,
data structures
2100
x3055
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3056
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3237
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3304
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3317
703D
Mishka and Interesting sum
data structures
2100
x3321
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3385
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3415
1667B
Optimal Partition
data structures
,
dp
2100
x3465
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3572
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x3619
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3636
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3720
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3792
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3855
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x3893
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3894
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x3941
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4080
1418D
Trash Problem
data structures
,
implementation
2100
x4170
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4490
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4607
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x4713
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4732
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5164
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5408
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x5765
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6051
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6161
1486D
Max Median
binary search
,
data structures
,
dp
2100
x6680
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x6909
474F
Ant colony
data structures
,
math
,
number theory
2100
x7637
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x218
66E
Petya and Post
data structures
,
dp
2000
x682
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x686
182C
Optimal Sum
data structures
,
greedy
2000
x705
82C
General Mobilization
data structures
,
dfs and similar
,
sortings
2000
x798
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x843
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1186
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1270
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1715
314C
Sereja and Subsequences
data structures
,
dp
2000
x1759
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1806
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x1893
1070C
Cloud Computing
data structures
,
greedy
2000
x1995
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2146
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2208
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2212
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2250
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2292
501D
Misha and Permutations Summation
data structures
2000
x2321
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2365
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2459
755D
PolandBall and Polygon
data structures
2000
x2465
749D
Leaving Auction
binary search
,
data structures
2000
x2520
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2628
1142B
Lynyrd Skynyrd
data structures
,
dfs and similar
,
dp
,
math
,
trees
2000
x2636
817E
Choosing The Commander
bitmasks
,
data structures
,
trees
2000
x2681
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2709
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2731
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x2859
1320C
World of Darkraft: Battle for Azathoth
brute force
,
data structures
,
sortings
2000
x2890
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2902
641E
Little Artem and Time Machine
data structures
2000
x2905
522D
Closest Equals
*special problem
,
data structures
2000
x2939
863E
Turn Off The TV
data structures
,
sortings
2000
x2941
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2984
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3091
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3107
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3209
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3219
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3260
1288E
Messenger Simulator
data structures
2000
x3319
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3344
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3345
940E
Cashback
data structures
,
dp
,
greedy
,
math
2000
x3397
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3406
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3456
446B
DZY Loves Modification
brute force
,
data structures
,
greedy
2000
x3513
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3576
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3655
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3681
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x3780
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3855
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x3856
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x3860
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x4000
1638D
Big Brush
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x4029
797E
Array Queries
brute force
,
data structures
,
dp
2000
x4043
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4081
1506G
Maximize the Remaining String
brute force
,
data structures
,
dp
,
greedy
,
strings
2000
x4091
514D
R2D2 and Droid Army
binary search
,
data structures
,
two pointers
2000
x4103
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4115
1257E
The Contest
data structures
,
dp
,
greedy
2000
x4116
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4154
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4161
877E
Danil and a Part-time Job
bitmasks
,
data structures
,
trees
2000
x4231
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4251
1702G2
Passable Paths (hard version)
data structures
,
dfs and similar
,
trees
2000
x4277
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4324
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