Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
38:33:08
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
strings
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
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21553
1512C
A-B Palindrome
constructive algorithms
,
implementation
,
strings
1200
x19381
1384A
Common Prefixes
constructive algorithms
,
greedy
,
strings
1200
x18340
1907C
Removal of Unattractive Pairs
constructive algorithms
,
greedy
,
math
,
strings
1200
x18147
1594C
Make Them Equal
brute force
,
greedy
,
math
,
strings
1200
x17775
1536B
Prinzessin der Verurteilung
brute force
,
constructive algorithms
,
strings
1200
x17627
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16767
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15528
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14208
1185B
Email from Polycarp
implementation
,
strings
1200
x12848
1076A
Minimizing the String
greedy
,
strings
1200
x12812
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12547
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11241
1140B
Good String
implementation
,
strings
1200
x11128
625B
War of the Corporations
constructive algorithms
,
greedy
,
strings
1200
x10047
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9659
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9489
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x8838
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8501
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8300
591B
Rebranding
implementation
,
strings
1200
x8122
989B
A Tide of Riverscape
constructive algorithms
,
strings
1200
x6966
722B
Verse Pattern
implementation
,
strings
1200
x6340
151B
Phone Numbers
implementation
,
strings
1200
x6208
5B
Center Alignment
implementation
,
strings
1200
x5517
8A
Train and Peter
strings
1200
x5480
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4908
412C
Pattern
implementation
,
strings
1200
x3845
928A
Login Verification
*special problem
,
strings
1200
x3330
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22026
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19801
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x18667
1037C
Equalize
dp
,
greedy
,
strings
1300
x18266
1560D
Make a Power of Two
greedy
,
math
,
strings
1300
x17591
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17275
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13781
1178B
WOW Factor
dp
,
strings
1300
x13776
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13508
1194C
From S To T
implementation
,
strings
1300
x12757
1029A
Many Equal Substrings
implementation
,
strings
1300
x11982
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x11834
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x10815
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x10582
598B
Queries on a String
implementation
,
strings
1300
x10404
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10304
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x10204
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x9883
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9092
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8903
946C
String Transformation
greedy
,
strings
1300
x8754
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8256
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7357
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x6996
66A
Petya and Java
implementation
,
strings
1300
x6181
628C
Bear and String Distance
greedy
,
strings
1300
x5644
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4862
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4058
61B
Hard Work
strings
1300
x3778
147A
Punctuation
implementation
,
strings
1300
x3543
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3505
291B
Command Line Arguments
*special problem
,
implementation
,
strings
1300
x3010
1363B
Subsequence Hate
implementation
,
strings
1400
x22810
1605C
Dominant Character
brute force
,
greedy
,
implementation
,
strings
1400
x16252
1624D
Palindromes Coloring
binary search
,
greedy
,
sortings
,
strings
1400
x16164
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16029
448B
Suffix Structures
implementation
,
strings
1400
x15614
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15170
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x14992
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x14148
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13903
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13230
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12460
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12065
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11562
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x10914
1905C
Largest Subsequence
greedy
,
strings
1400
x10877
1251B
Binary Palindromes
greedy
,
strings
1400
x10711
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9524
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9163
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7787
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7786
954B
String Typing
implementation
,
strings
1400
x7091
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5657
898C
Phone Numbers
implementation
,
strings
1400
x5122
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2911
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x515
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36093
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x18969
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x17968
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15546
1404A
Balanced Bitstring
implementation
,
strings
1500
x14718
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13600
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13267
1551C
Interesting Story
greedy
,
sortings
,
strings
1500
x12840
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12109
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11950
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x11594
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x11576
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x11478
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x10956
←
1
2
3
4
5
6
7
→
User lists
Name