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Codeforces Round 942 (Div. 1)
00:07:17
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Codeforces Round 942 (Div. 2)
00:07:16
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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
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ternary search
trees
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Name
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13475
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13921
1551B2
Wonderful Coloring - 2
binary search
,
constructive algorithms
,
data structures
,
greedy
1400
x15028
650A
Watchmen
data structures
,
geometry
,
math
1400
x15037
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15058
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15417
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x15852
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x15930
295A
Greg and Array
data structures
,
implementation
1400
x16012
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x16237
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x16372
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x16458
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x16711
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x18344
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20144
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x20411
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x20677
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x22330
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x24509
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26669
195B
After Training
data structures
,
implementation
,
math
1300
x5119
1424G
Years
data structures
,
sortings
1300
x5637
222B
Cosmic Tables
data structures
,
implementation
1300
x5979
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6601
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6743
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7782
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8167
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9329
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10510
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10692
1100B
Build a Contest
data structures
,
implementation
1300
x10884
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11980
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12057
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12291
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14343
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14473
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14665
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15756
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16052
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16441
1698C
3SUM Closure
brute force
,
data structures
1300
x17862
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18085
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18100
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x18282
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19829
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x26927
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27335
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76878
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10585
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11549
701B
Cells Not Under Attack
data structures
,
math
1200
x11572
879B
Table Tennis
data structures
,
implementation
1200
x11855
18C
Stripe
data structures
,
implementation
1200
x12439
1214C
Bad Sequence
data structures
,
greedy
1200
x12813
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13298
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13866
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14278
1104B
Game with string
data structures
,
implementation
,
math
1200
x14440
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x14997
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16027
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16841
1679B
Stone Age Problem
data structures
,
implementation
1200
x16905
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17895
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18048
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x18092
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19159
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20008
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20173
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21625
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x21667
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26753
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42452
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4219
834B
The Festive Evening
data structures
,
implementation
1100
x8508
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8645
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10912
427B
Prison Transfer
data structures
,
implementation
1100
x13685
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13756
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15587
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17601
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17790
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18089
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x19132
767A
Snacktower
data structures
,
implementation
1100
x19213
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19269
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19571
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19617
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19862
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20382
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x21263
1702C
Train and Queries
data structures
,
greedy
1100
x21449
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x22089
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x22945
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24258
1213B
Bad Prices
data structures
,
implementation
1100
x25596
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26878
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37635
368B
Sereja and Suffixes
data structures
,
dp
1100
x39436
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15850
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x18381
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