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Problems
#
Name
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12410
1461A
String Generation
constructive algorithms
,
greedy
800
x18438
1459B
Move and Turn
dp
,
math
1300
x14119
1459A
Red-Blue Shuffle
math
,
probabilities
800
x16837
1458F
Range Diameter Sum
data structures
,
trees
3500
x260
1458E
Nim Shortcuts
data structures
,
games
3100
x412
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x983
1458C
Latin Square
math
,
matrices
2700
x1217
1458B
Glass Half Spilled
dp
2000
x3407
1458A
Row GCD
math
,
number theory
1600
x16522
1456E
XOR-ranges
dp
,
greedy
3500
x272
1455G
Forbidden Value
data structures
,
dp
2900
x399
1455F
String and Operations
dp
,
greedy
2800
x419
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1442
1455D
Sequence and Swaps
dp
,
greedy
,
sortings
1600
x12045
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19296
1455B
Jumps
constructive algorithms
,
math
1200
x21371
1455A
Strange Functions
math
,
number theory
800
x26110
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3837
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x5559
1454D
Number into Sequence
constructive algorithms
,
math
,
number theory
1300
x19871
1454C
Sequence Transformation
greedy
,
implementation
1200
x21075
1454B
Unique Bid Auction
implementation
800
x27665
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x39554
1453F
Even Harder
dp
2700
x810
1453E
Dog Snacks
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1981
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4095
1453C
Triangles
greedy
,
implementation
1700
x5993
1453B
Suffix Operations
constructive algorithms
,
implementation
1400
x13192
1453A
Cancel the Trains
implementation
800
x22317
1452G
Game On Tree
data structures
,
dfs and similar
,
greedy
,
trees
2700
x461
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x299
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1489
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x7794
1452C
Two Brackets
greedy
800
x19113
1452B
Toy Blocks
binary search
,
greedy
,
math
,
sortings
1400
x14483
1452A
Robot Program
math
800
x21887
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x922
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x2880
1451E1
Bitwise Queries (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2000
x4242
1451D
Circle Game
games
,
geometry
,
math
1700
x9311
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15274
1451B
Non-Substring Subsequence
dp
,
greedy
,
implementation
,
strings
900
x19056
1451A
Subtract or Divide
greedy
,
math
800
x23980
1450H2
Multithreading (Hard Version)
combinatorics
,
implementation
,
math
3300
x170
1450H1
Multithreading (Easy Version)
combinatorics
,
fft
,
math
2900
x381
1450G
Communism
bitmasks
,
dp
,
trees
3500
x235
1450F
The Struggling Contestant
constructive algorithms
,
greedy
2400
x1284
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x1037
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x5337
1450C2
Errich-Tac-Toe (Hard Version)
constructive algorithms
,
math
2300
x3555
1450C1
Errich-Tac-Toe (Easy Version)
constructive algorithms
,
math
2100
x5348
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x14966
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x17545
1447B
Numbers Box
greedy
,
math
1000
x15566
1447A
Add Candies
constructive algorithms
,
math
800
x13669
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x274
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x79
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x1239
1446D1
Frequency Problem (Easy Version)
data structures
,
greedy
2600
x1634
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3417
1446B
Catching Cheaters
dp
,
strings
1800
x7608
1446A
Knapsack
constructive algorithms
,
greedy
,
sortings
1300
x15087
1445B
Elimination
greedy
,
math
900
x15108
1445A
Array Rearrangment
greedy
,
sortings
800
x18876
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x133
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x549
1444C
Team-Building
data structures
,
dfs and similar
,
dsu
,
graphs
2500
x1467
1444B
Divide and Sum
combinatorics
,
math
,
sortings
1900
x6079
1444A
Division
brute force
,
math
,
number theory
1500
x12670
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1230
1443C
The Delivery Dilemma
binary search
,
greedy
,
sortings
1400
x15021
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15569
1443A
Kids Seating
constructive algorithms
,
math
800
x16099
1442F
Differentiating Games
games
,
interactive
3400
x130
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x561
1442D
Sum
data structures
,
divide and conquer
,
dp
,
greedy
2800
x1943
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1585
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4333
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8611
1440B
Sum of Medians
greedy
,
math
900
x17752
1440A
Buy the String
implementation
,
math
800
x19554
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x218
1439D
INOI Final Contests
combinatorics
,
dp
,
fft
3100
x347
1439C
Greedy Shopping
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
2600
x1688
1439B
Graph Subset Problem
constructive algorithms
,
data structures
,
graphs
2600
x1362
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4967
1439A1
Binary Table (Easy Version)
constructive algorithms
,
implementation
1500
x9204
1438F
Olha and Igor
interactive
,
probabilities
,
trees
3000
x618
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1299
1438D
Powerful Ksenia
bitmasks
,
constructive algorithms
,
math
2200
x4088
1438C
Engineer Artem
2-sat
,
chinese remainder theorem
,
constructive algorithms
,
fft
,
flows
2000
x10239
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x18768
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x19146
1437G
Death DBMS
data structures
,
string suffix structures
,
strings
,
trees
2600
x959
1437F
Emotional Fishermen
combinatorics
,
dp
,
math
,
two pointers
2600
x1175
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3347
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x12380
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x10184
1437B
Reverse Binary Strings
constructive algorithms
,
greedy
1200
x18757
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Codeforces Round 953 (Div. 2)
02:43:53
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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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