Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 973 (Div. 2)
29:03:03
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
implementation
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
883A
Automatic Door
implementation
2200
x587
879B
Table Tennis
data structures
,
implementation
1200
x12330
879A
Borya's Diagnosis
implementation
900
x9058
878B
Teams Formation
data structures
,
implementation
2300
x1052
877A
Alex and broken contest
implementation
,
strings
1100
x10858
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x9097
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x2115
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5180
873B
Balanced Substring
dp
,
implementation
1500
x7744
873A
Chores
implementation
800
x8188
870A
Search for Pretty Integers
brute force
,
implementation
900
x10116
869A
The Artful Expedient
brute force
,
implementation
1100
x9449
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x904
868B
Race Against Time
implementation
1400
x3669
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8668
867A
Between the Offices
implementation
800
x19204
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x5988
864C
Bus
greedy
,
implementation
,
math
1500
x5851
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9093
864A
Fair Game
implementation
,
sortings
1000
x11634
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3237
863C
1-2-3
graphs
,
implementation
1800
x2488
863A
Quasi-palindrome
brute force
,
implementation
900
x10141
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9472
859A
Declined Finalists
greedy
,
implementation
800
x7699
858E
Tests Renumeration
greedy
,
implementation
2200
x504
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x3819
858C
Did you mean...
dp
,
greedy
,
implementation
1500
x5613
858B
Which floor?
brute force
,
implementation
1500
x3724
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x21416
852G
Bathroom terminal
implementation
1700
x1281
852A
Digits
brute force
,
implementation
,
math
2500
x385
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9667
850B
Arpa and a list of numbers
implementation
,
number theory
2100
x2023
849A
Odds and Ends
implementation
1000
x9045
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1888
847M
Weather Tomorrow
implementation
,
math
1000
x6262
847K
Travel Cards
greedy
,
implementation
,
sortings
1800
x1677
847I
Noise Level
dfs and similar
,
implementation
,
math
1900
x1520
847G
University Classes
implementation
900
x6691
847A
Union of Doubly Linked Lists
implementation
1500
x3350
846A
Curriculum Vitae
brute force
,
implementation
1500
x4227
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x5018
845A
Chess Tourney
implementation
,
sortings
1100
x7747
844A
Diversity
greedy
,
implementation
,
strings
1000
x10903
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5618
841A
Generous Kefa
brute force
,
implementation
900
x13116
839B
Game of the Rows
brute force
,
greedy
,
implementation
1900
x3319
839A
Arya and Bran
implementation
900
x14121
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1763
837C
Two Seals
brute force
,
implementation
1500
x3989
837B
Flag of Berland
brute force
,
implementation
1600
x3926
837A
Text Volume
implementation
800
x9374
835C
Star sky
dp
,
implementation
1600
x7857
834B
The Festive Evening
data structures
,
implementation
1100
x8759
834A
The Useless Toy
implementation
900
x8624
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x392
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x446
832B
Petya and Exam
implementation
,
strings
1600
x4371
831B
Keyboard Layouts
implementation
,
strings
800
x14334
831A
Unimodal Array
implementation
1000
x10240
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x277
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1196
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2832
828B
Black Square
implementation
1300
x5683
828A
Restaurant Tables
implementation
1200
x7906
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3503
825D
Suitable Replacement
binary search
,
greedy
,
implementation
1500
x3258
825C
Multi-judge Solving
greedy
,
implementation
1600
x4529
825B
Five-In-a-Row
brute force
,
implementation
1600
x4245
825A
Binary Protocol
implementation
1100
x7674
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4575
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9506
822A
I'm bored with life
implementation
,
math
,
number theory
800
x32874
821A
Okabe and Future Gadget Laboratory
implementation
800
x8227
820A
Mister B and Book Reading
implementation
900
x8116
819B
Mister B and PR Shifts
data structures
,
implementation
,
math
1900
x1695
818D
Multicolored Cars
data structures
,
implementation
1700
x3460
818C
Sofa Thief
brute force
,
implementation
2000
x1240
818B
Permutation Game
implementation
1600
x3009
818A
Diplomas and Certificates
implementation
,
math
800
x6932
817B
Makes And The Product
combinatorics
,
implementation
,
math
,
sortings
1500
x5706
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6224
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x17725
816A
Karen and Morning
brute force
,
implementation
1000
x9024
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x222
815A
Karen and Game
brute force
,
greedy
,
implementation
1700
x5614
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10369
813A
The Contest
implementation
1100
x5080
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x329
812A
Sagheer and Crossroads
implementation
1200
x6200
811C
Vladik and Memorable Trip
dp
,
implementation
1900
x3244
811B
Vladik and Complicated Book
implementation
,
sortings
1200
x6471
811A
Vladik and Courtesy
brute force
,
implementation
800
x11856
810A
Straight <<A>>
implementation
,
math
900
x8801
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4686
808D
Array Division
binary search
,
data structures
,
implementation
1900
x6971
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x7510
808A
Lucky Year
implementation
900
x9298
807B
T-Shirt Hunt
brute force
,
implementation
1300
x3542
←
1
2
...
14
15
16
17
18
...
27
28
→
User lists
Name