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Problems
#
Name
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1059
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5409
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12467
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x11601
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x76
1375H
Set Merging
constructive algorithms
,
divide and conquer
3300
x394
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1640
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1929
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x2769
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x8721
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x20420
1375B
Neighbor Grid
constructive algorithms
,
greedy
1200
x16913
1375A
Sign Flipping
constructive algorithms
,
math
1100
x18033
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1256
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x900
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13512
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x22171
1374C
Move Brackets
greedy
,
strings
1000
x43346
1374B
Multiply by 2, divide by 6
math
900
x45774
1374A
Required Remainder
math
800
x50549
1373G
Pawns
data structures
,
divide and conquer
,
greedy
2600
x767
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1618
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x2695
1373D
Maximum Sum on Even Positions
divide and conquer
,
dp
,
greedy
,
implementation
1600
x14939
1373C
Pluses and Minuses
math
1300
x17925
1373B
01 Game
games
900
x32749
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x25782
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x423
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x965
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5286
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17361
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x26115
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31412
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x504
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2293
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x4948
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x12787
1371C
A Cookie for You
greedy
,
implementation
,
math
1300
x20163
1371B
Magical Calendar
math
1200
x18998
1371A
Magical Sticks
math
800
x44259
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1243
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1363
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4610
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9122
1370C
Number Game
games
,
math
,
number theory
1400
x23513
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23078
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48679
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x596
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2014
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8260
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19023
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x23746
1369A
FashionabLee
geometry
,
math
800
x35565
1368H2
Breadboard Capacity (hard version)
3500
x219
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x327
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x397
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x845
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x1936
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11207
1368C
Even Picture
constructive algorithms
1500
x12993
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19013
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36749
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1441
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x2982
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5127
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x7963
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x22586
1367B
Even Array
greedy
,
math
800
x50211
1367A
Short Substrings
implementation
,
strings
800
x54808
1366G
Construct the String
data structures
,
dp
,
strings
2700
x532
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x590
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3958
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x9904
1366C
Palindromic Paths
greedy
,
math
1500
x13139
1366B
Shuffle
math
,
two pointers
1300
x19581
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x28932
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x916
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4305
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7494
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16128
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x22355
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x26002
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x23551
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1113
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4014
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x12666
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x18416
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26774
1363F
Rotating Substrings
dp
,
strings
2600
x1276
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6480
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3827
1363C
Game On Leaves
games
,
trees
1600
x17810
1363B
Subsequence Hate
implementation
,
strings
1400
x22872
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34342
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x17004
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x18340
1362A
Johnny and Ancient Computer
implementation
1000
x22468
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x145
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x625
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x306
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
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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
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strings
ternary search
trees
two pointers
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