Enter
|
Register
Home
Top
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round #697 (Div. 3)
3 days
→ 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
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x4930
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x15385
1466G
Song of the Sirens
combinatorics
,
divide and conquer
,
hashing
,
math
,
string suffix structures
,
strings
2600
x526
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x11173
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1188
1411E
Poman Numbers
bitmasks
,
greedy
,
math
,
strings
2300
x1063
1411D
Grime Zoo
brute force
,
greedy
,
implementation
,
strings
2100
x1652
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x16900
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x9019
1451B
Non-Substring Subsequence
dp
,
greedy
,
implementation
,
strings
900
x13347
1446B
Catching Cheaters
dp
,
strings
1800
x4609
1431I
Cyclic Shifts
*special problem
,
strings
2900
x19
1437G
Death DBMS
data structures
,
string suffix structures
,
strings
,
trees
2600
x453
1421C
Palindromifier
constructive algorithms
,
strings
1400
x8026
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x11572
1430E
String Reversal
data structures
,
greedy
,
strings
1900
x3771
1422E
Minlexes
dp
,
greedy
,
implementation
,
strings
2700
x502
1426F
Number of Subsequences
combinatorics
,
dp
,
strings
2000
x2982
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x2345
1404A
Balanced Bitstring
implementation
,
strings
1500
x10322
1409F
Subsequences of Length Two
dp
,
strings
2100
x2838
1397A
Juggling Letters
greedy
,
strings
800
x20596
1400F
x-prime Substrings
brute force
,
dfs and similar
,
dp
,
string suffix structures
,
strings
2800
x368
1400A
String Similarity
constructive algorithms
,
strings
800
x20831
1394E
Boboniu and Banknote Collection
strings
3500
x39
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x122
1393E1
Twilight and Ancient Scroll (easier version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x185
1384A
Common Prefixes
constructive algorithms
,
greedy
,
strings
1200
x13490
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x7623
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x8594
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x9243
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x14288
1374C
Move Brackets
greedy
,
strings
1000
x23084
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x12544
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x17078
1367A
Short Substrings
implementation
,
strings
800
x29424
1366G
Construct the String
data structures
,
dp
,
strings
2700
x334
1363F
Rotating Substrings
dp
,
strings
2600
x780
1363B
Subsequence Hate
implementation
,
strings
1400
x14569
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x8069
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x10677
1342B
Binary Period
constructive algorithms
,
strings
1100
x18112
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x2489
1331F
Elementary!
brute force
,
dp
,
strings
x441
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x11024
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x6353
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x8488
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x17840
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x8236
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x8668
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x6741
1320D
Reachable Strings
data structures
,
hashing
,
strings
2500
x785
1297H
Paint the String
*special problem
,
dp
,
strings
x17
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x6503
1310C
Au Pont Rouge
binary search
,
dp
,
strings
2800
x224
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x279
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x8280
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x13471
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x6693
1301A
Three Strings
implementation
,
strings
800
x15429
1303E
Erase Subsequences
dp
,
strings
2200
x1772
1303A
Erasing Zeroes
implementation
,
strings
800
x18555
1291A
Even But Not Even
greedy
,
math
,
strings
900
x14000
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x3485
1295C
Obtain The String
dp
,
greedy
,
strings
1600
x8537
1295B
Infinite Prefixes
math
,
strings
1700
x7057
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x4912
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x97
1284A
New Year and Naming
implementation
,
strings
800
x15590
1270F
Awesome Substrings
math
,
strings
2600
x639
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x1532
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x6310
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x10727
1272F
Two Bracket Sequences
dp
,
strings
,
two pointers
2200
x1089
1267L
Lexicography
constructive algorithms
,
strings
1800
x1830
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x11266
1243B2
Character Swap (Hard Version)
strings
1600
x5363
1243B1
Character Swap (Easy Version)
strings
1000
x11138
1256F
Equalizing Two Strings
constructive algorithms
,
sortings
,
strings
2000
x2134
1251B
Binary Palindromes
greedy
,
strings
1400
x7989
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x12542
1252D
Find String in a Grid
data structures
,
dp
,
strings
,
trees
3000
x145
1238D
AB-string
binary search
,
combinatorics
,
dp
,
strings
1900
x4201
1223B
Strings Equalization
strings
1000
x10911
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x461
1216A
Prefixes
strings
800
x13937
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x7477
1220A
Cards
implementation
,
sortings
,
strings
800
x19162
1219C
Periodic integer number
implementation
,
strings
1700
x1148
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x583
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x92
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x1595
1207G
Indie Album
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
2700
x438
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x2344
1204D1
Kirk and a Binary String (easy version)
brute force
,
greedy
,
strings
2000
x2270
1205E
Expected Value Again
combinatorics
,
strings
3100
x116
1200E
Compress Words
brute force
,
hashing
,
implementation
,
string suffix structures
,
strings
2000
x3480
1202E
You Are Given Some Strings...
brute force
,
string suffix structures
,
strings
2400
x779
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x3520
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x1670
←
1
2
3
4
5
→
User lists
Name