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Codeforces Round 940 (Div. 2)
4 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
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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Problems
Submit
Status
Standings
Custom test
Problems
#
Name
405B
Domino Effect
1100
x5612
821B
Okabe and Banana Trees
brute force
,
math
1300
x5621
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5621
1175D
Array Splitting
greedy
,
sortings
1900
x5622
703B
Mishka and trip
implementation
,
math
1400
x5627
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5631
1424G
Years
data structures
,
sortings
1300
x5633
1556C
Compressed Bracket Sequence
brute force
,
implementation
1800
x5635
813C
The Tag Game
dfs and similar
,
graphs
1700
x5635
628C
Bear and String Distance
greedy
,
strings
1300
x5642
1477A
Nezzar and Board
constructive algorithms
,
math
,
number theory
1800
x5647
828B
Black Square
implementation
1300
x5647
957A
Tritonic Iridescence
implementation
1300
x5653
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5654
721C
Journey
dp
,
graphs
1800
x5655
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5658
1210B
Marcin and Training Camp
brute force
,
greedy
1700
x5659
976B
Lara Croft and the New Game
implementation
,
math
1300
x5660
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5663
593A
2Char
brute force
,
implementation
1200
x5664
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x5665
18A
Triangle
brute force
,
geometry
1500
x5667
1030D
Vasya and Triangle
geometry
,
number theory
1800
x5668
1162B
Double Matrix
brute force
,
greedy
1400
x5669
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5672
106C
Buns
dp
1700
x5674
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x5675
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x5678
185A
Plant
math
1300
x5681
12C
Fruits
greedy
,
implementation
,
sortings
1100
x5681
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5689
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5694
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5697
190A
Vasya and the Bus
greedy
,
math
1100
x5703
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5706
1092C
Prefixes and Suffixes
strings
1700
x5711
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x5714
1872F
Selling a Menagerie
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1800
x5715
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5718
1238D
AB-string
binary search
,
combinatorics
,
dp
,
strings
1900
x5718
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x5731
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5735
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5735
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x5737
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5737
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5742
899B
Months and Years
implementation
1200
x5745
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x5746
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5752
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5753
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x5753
439D
Devu and his Brother
binary search
,
sortings
,
ternary search
,
two pointers
1700
x5757
1207D
Number Of Permutations
combinatorics
1800
x5760
853A
Planning
greedy
1500
x5761
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5762
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x5762
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5763
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x5765
1208C
Magic Grid
constructive algorithms
1800
x5767
1812J
Unmysterious Language
*special problem
,
constructive algorithms
,
strings
x5771
641A
Little Artem and Grasshopper
implementation
1000
x5772
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x5782
990C
Bracket Sequences Concatenation Problem
implementation
1500
x5786
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5788
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x5795
639A
Bear and Displayed Friends
implementation
1200
x5796
464A
No to Palindromes!
greedy
,
strings
1700
x5803
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5804
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5807
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5810
1433F
Zero Remainder Sum
dp
2100
x5815
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5819
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5819
25C
Roads in Berland
graphs
,
shortest paths
1900
x5819
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5820
1272E
Nearest Opposite Parity
dfs and similar
,
graphs
,
shortest paths
1900
x5821
1006D
Two Strings Swaps
implementation
1700
x5821
864C
Bus
greedy
,
implementation
,
math
1500
x5822
1495B
Let's Go Hiking
games
,
greedy
1900
x5824
1186C
Vus the Cossack and Strings
implementation
,
math
1800
x5824
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5824
1809D
Binary String Sorting
constructive algorithms
,
greedy
1800
x5828
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5838
1279D
Santa's Bot
combinatorics
,
math
,
probabilities
1700
x5839
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5850
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x5851
420A
Start Up
implementation
1000
x5852
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x5875
471B
MUH and Important Things
implementation
,
sortings
1300
x5878
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5879
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x5880
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x5880
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x5883
490B
Queue
dsu
,
implementation
1500
x5883
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5884
1416B
Make Them Equal
constructive algorithms
,
greedy
,
math
2000
x5885
792B
Counting-out Rhyme
implementation
1300
x5891
1848C
Vika and Price Tags
math
,
number theory
1800
x5893
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x5894
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x5899
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