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ICPC Challenge
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Before contest
Codeforces Round 914 (Div. 2)
29:55:22
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Difficulty:
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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
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Status
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Custom test
Problems
#
Name
4C
Registration System
data structures
,
hashing
,
implementation
1300
x70686
1703B
ICPC Balloons
data structures
,
implementation
800
x41291
1520D
Same Differences
data structures
,
hashing
,
math
1200
x38155
368B
Sereja and Suffixes
data structures
,
dp
1100
x37420
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x35986
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x33015
1760C
Advantage
data structures
,
implementation
,
sortings
800
x32367
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x27843
1722C
Word Game
data structures
,
implementation
800
x27553
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x25914
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x25516
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x25364
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x25307
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x25067
1807D
Odd Queries
data structures
,
implementation
900
x24699
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x24662
1213B
Bad Prices
data structures
,
implementation
1100
x24347
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x23770
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23420
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x22443
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x22205
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x22172
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x22089
339D
Xenia and Bit Operations
data structures
,
trees
1700
x22078
1730A
Planets
data structures
,
greedy
,
sortings
800
x21936
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x21487
1380A
Three Indices
brute force
,
data structures
900
x21405
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x21076
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x20862
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x20723
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x20700
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x20658
1702C
Train and Queries
data structures
,
greedy
1100
x20225
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20217
1622B
Berland Music
data structures
,
greedy
,
math
,
sortings
1000
x19956
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x19766
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x19676
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x19672
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x19608
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x19594
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x19557
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x19510
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19461
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x19414
1526C2
Potions (Hard Version)
data structures
,
greedy
1600
x19364
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x19348
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x19335
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19119
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x18968
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x18963
767A
Snacktower
data structures
,
implementation
1100
x18294
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x18087
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x17917
1492B
Card Deck
data structures
,
greedy
,
math
1100
x17705
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x17638
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x17580
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x17252
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17037
1698C
3SUM Closure
brute force
,
data structures
1300
x16909
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x16769
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x16650
1689B
Mystic Permutation
data structures
,
greedy
900
x16642
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x16565
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x16532
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x16275
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x16266
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x16013
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16013
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x15908
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x15793
1679B
Stone Age Problem
data structures
,
implementation
1200
x15692
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x15659
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x15254
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x15226
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x15202
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15140
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x15095
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15001
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x14991
295A
Greg and Array
data structures
,
implementation
1400
x14916
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x14882
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x14866
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x14847
1490F
Equalize the Array
binary search
,
data structures
,
greedy
,
math
,
sortings
1500
x14674
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x14672
1551B2
Wonderful Coloring - 2
binary search
,
constructive algorithms
,
data structures
,
greedy
1400
x14526
650A
Watchmen
data structures
,
geometry
,
math
1400
x14418
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x14398
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x14145
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x14063
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14044
1104B
Game with string
data structures
,
implementation
,
math
1200
x14021
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x13970
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x13948
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x13835
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x13579
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13454
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x13396
1234D
Distinct Characters Queries
data structures
1600
x13393
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13304
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