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Codeforces Round #851 (Div. 2)
38:14:28
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binary search
combine-tags-by-or
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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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Problems
#
Name
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x3573
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x7409
1791G2
Teleporters (Hard Version)
binary search
,
greedy
,
sortings
1900
x1981
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x5732
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x96
1784C
Monsters (hard version)
binary search
,
data structures
,
greedy
x840
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x6581
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1081
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
x351
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
x820
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
x3098
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
x989
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
x4936
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x444
1773H
Hot and Cold
binary search
,
interactive
2600
x217
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x519
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x903
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x584
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x8794
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x729
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x869
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x799
1765D
Watch the Videos
binary search
,
constructive algorithms
,
two pointers
1700
x2452
1764G3
Doremy's Perfect DS Class (Hard Version)
binary search
,
interactive
3300
x217
1764G2
Doremy's Perfect DS Class (Medium Version)
binary search
,
interactive
3000
x261
1764G1
Doremy's Perfect DS Class (Easy Version)
binary search
,
interactive
2900
x303
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x10125
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x284
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1336
1760F
Quests
binary search
,
greedy
,
sortings
1500
x7515
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x3016
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x2556
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x4937
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x227
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1090
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x10411
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1254
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x3641
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x68
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1110
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x17510
1743E
FTL
binary search
,
dp
2400
x1181
1742E
Scuza
binary search
,
greedy
,
math
1200
x14678
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x1686
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x3789
1737G
Ela Takes Dancing Class
binary search
,
data structures
3500
x77
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x7702
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x992
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x11501
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x1965
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x4212
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x5031
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x9153
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x302
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x55
1725G
Garage
binary search
,
geometry
,
math
1500
x4069
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x90
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1092
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x7801
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x10781
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x10840
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x5463
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x187
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x1678
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x3657
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x375
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x1991
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x6704
1707E
Replace
binary search
,
data structures
3500
x319
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x10547
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x1790
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x5676
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1660
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x13685
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x4710
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x12695
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x4892
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x7282
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x3662
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x11819
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x4517
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x181
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x14919
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x4369
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x2588
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x11808
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x414
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1112
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x2619
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x7768
1679D
Toss a Coin to Your Graph...
binary search
,
dfs and similar
,
dp
,
graphs
1900
x3618
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x18811
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x5131
1672E
notepad.exe
binary search
,
constructive algorithms
,
greedy
,
interactive
2200
x1869
1671C
Dolce Vita
binary search
,
brute force
,
greedy
,
math
1200
x13258
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4206
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x17100
1666E
Even Split
binary search
,
constructive algorithms
,
greedy
,
math
2500
x553
1665C
Tree Infection
binary search
,
greedy
,
sortings
,
trees
1600
x6825
1661F
Teleporters
binary search
,
greedy
2600
x429
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