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Before contest
Codeforces Round 941 (Div. 1)
09:17:38
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Before contest
Codeforces Round 941 (Div. 2)
09:17:39
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data structures
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
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number theory
probabilities
schedules
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sortings
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strings
ternary search
trees
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Problems
#
Name
1703B
ICPC Balloons
data structures
,
implementation
800
x45070
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34821
1722C
Word Game
data structures
,
implementation
800
x29324
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29245
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25355
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23836
1730A
Planets
data structures
,
greedy
,
sortings
800
x22486
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20733
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x19914
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19552
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17761
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11344
1807D
Odd Queries
data structures
,
implementation
900
x28468
1380A
Three Indices
brute force
,
data structures
900
x23153
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21939
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x21796
1689B
Mystic Permutation
data structures
,
greedy
900
x17083
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x23274
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x23034
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x22294
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x22286
1622B
Berland Music
data structures
,
greedy
,
math
,
sortings
1000
x20512
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x20277
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x18363
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15846
368B
Sereja and Suffixes
data structures
,
dp
1100
x39398
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37609
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26841
1213B
Bad Prices
data structures
,
implementation
1100
x25584
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24225
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x22904
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x22060
1702C
Train and Queries
data structures
,
greedy
1100
x21439
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x21240
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20371
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19841
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19612
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19561
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19222
767A
Snacktower
data structures
,
implementation
1100
x19184
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x19113
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18083
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17778
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17588
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15568
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13747
427B
Prison Transfer
data structures
,
implementation
1100
x13680
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10907
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8643
834B
The Festive Evening
data structures
,
implementation
1100
x8506
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4214
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42399
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26738
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x21641
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21596
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20147
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x19996
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19120
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x18066
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18025
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17879
1679B
Stone Age Problem
data structures
,
implementation
1200
x16888
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16816
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16022
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x14990
1104B
Game with string
data structures
,
implementation
,
math
1200
x14425
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14264
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13859
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13284
1214C
Bad Sequence
data structures
,
greedy
1200
x12810
18C
Stripe
data structures
,
implementation
1200
x12435
879B
Table Tennis
data structures
,
implementation
1200
x11851
701B
Cells Not Under Attack
data structures
,
math
1200
x11570
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11406
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10584
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76750
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27296
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x26887
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19827
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x18240
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18061
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18057
1698C
3SUM Closure
brute force
,
data structures
1300
x17852
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16438
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16032
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15743
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14638
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14460
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14338
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12284
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11974
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x11851
1100B
Build a Contest
data structures
,
implementation
1300
x10883
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10680
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10499
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9327
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8162
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7780
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6737
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6583
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