Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 940 (Div. 2)
3 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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1428B
Belted Rooms
graphs
,
implementation
1200
x14151
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x14145
1514C
Product 1 Modulo N
greedy
,
number theory
1600
x14136
1573B
Swaps
greedy
,
math
,
sortings
1400
x14135
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x14134
1260A
Heating
math
1000
x14132
1881D
Divide and Equalize
math
,
number theory
1300
x14124
1825B
LuoTianyi and the Table
greedy
,
math
1000
x14112
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x14085
1234D
Distinct Characters Queries
data structures
1600
x14075
527A
Playing with Paper
implementation
,
math
1100
x14068
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x14064
260A
Adding Digits
implementation
,
math
1400
x14060
831B
Keyboard Layouts
implementation
,
strings
800
x14040
488A
Giga Tower
brute force
1100
x14029
467C
George and Job
dp
,
implementation
1700
x14020
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x14015
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14011
439B
Devu, the Dumb Guy
implementation
,
sortings
1200
x13996
365B
The Fibonacci Segment
implementation
1100
x13993
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x13983
462B
Appleman and Card Game
greedy
1300
x13970
714B
Filya and Homework
implementation
,
sortings
1200
x13969
1818B
Indivisible
constructive algorithms
900
x13960
1199A
City Day
implementation
1000
x13954
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x13945
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x13943
1321A
Contest for Robots
greedy
900
x13940
839A
Arya and Bran
implementation
900
x13920
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x13912
897A
Scarborough Fair
implementation
800
x13901
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13898
1623B
Game on Ranges
brute force
,
dfs and similar
,
implementation
,
sortings
1100
x13871
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x13864
1901B
Chip and Ribbon
greedy
,
math
1100
x13856
994A
Fingerprints
implementation
800
x13854
591A
Wizards' Duel
implementation
,
math
900
x13854
215A
Bicycle Chain
brute force
,
implementation
900
x13851
797A
k-Factorization
implementation
,
math
,
number theory
1100
x13850
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13844
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13826
114A
Cifera
math
1000
x13818
1459B
Move and Turn
dp
,
math
1300
x13817
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x13814
1296D
Fight with Monsters
greedy
,
sortings
1500
x13811
389A
Fox and Number Game
greedy
,
math
1000
x13809
588B
Duff in Love
math
1300
x13801
1602B
Divine Array
constructive algorithms
,
implementation
1100
x13797
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x13797
1166A
Silent Classroom
combinatorics
,
greedy
900
x13797
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x13792
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x13787
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13774
1178B
WOW Factor
dp
,
strings
1300
x13770
1253C
Sweets Eating
dp
,
greedy
,
math
,
sortings
1500
x13765
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13756
1291B
Array Sharpening
greedy
,
implementation
1300
x13750
1248A
Integer Points
geometry
,
math
1000
x13742
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13738
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13737
1804B
Vaccination
greedy
,
implementation
1000
x13728
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x13724
570A
Elections
implementation
1100
x13723
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x13718
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x13715
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x13701
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13701
1810C
Make It Permutation
brute force
,
greedy
,
sortings
1300
x13700
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13696
499A
Watching a movie
greedy
,
implementation
1000
x13692
1606C
Banknotes
greedy
,
number theory
1400
x13688
914A
Perfect Squares
brute force
,
implementation
,
math
900
x13688
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x13684
688A
Opponents
implementation
800
x13679
427B
Prison Transfer
data structures
,
implementation
1100
x13666
1060A
Phone Numbers
brute force
800
x13655
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x13653
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13648
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13646
492C
Vanya and Exams
greedy
,
sortings
1400
x13645
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x13635
1117B
Emotes
greedy
,
math
,
sortings
1000
x13634
1447A
Add Candies
constructive algorithms
,
math
800
x13632
1189B
Number Circle
greedy
,
math
,
sortings
1100
x13624
1041B
Buying a TV Set
math
1000
x13620
1183C
Computer Game
binary search
,
math
1400
x13619
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13612
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13612
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13590
1200B
Block Adventure
dp
,
greedy
1200
x13573
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13572
1786A1
Non-alternating Deck (easy version)
implementation
800
x13563
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13555
1491B
Minimal Cost
brute force
,
math
1200
x13552
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x13550
1545A
AquaMoon and Strange Sort
sortings
1500
x13522
1583A
Windblume Ode
math
,
number theory
800
x13521
160B
Unlucky Ticket
greedy
,
sortings
1100
x13520
16A
Flag
implementation
800
x13513
1197C
Array Splitting
greedy
,
sortings
1400
x13509
←
1
2
...
16
17
18
19
20
...
94
95
→
User lists
Name