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Problems
#
Name
1055F
Tree and XOR
strings
,
trees
2900
x447
1055E
Segments on the Line
binary search
,
dp
2500
x711
1055D
Refactoring
greedy
,
implementation
,
strings
2400
x616
1055C
Lucky Days
math
,
number theory
1900
x1844
1055B
Alice and Hairdresser
dsu
,
implementation
1300
x4901
1055A
Metro
graphs
900
x10406
1054H
Epic Convolution
chinese remainder theorem
,
fft
,
math
,
number theory
3500
x174
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x263
1054F
Electric Scheme
flows
,
graph matchings
2700
x306
1054E
Chips Puzzle
constructive algorithms
,
implementation
,
math
2400
x479
1054D
Changing Array
greedy
,
implementation
1900
x2215
1054C
Candies Distribution
constructive algorithms
,
implementation
1500
x4232
1054B
Appending Mex
implementation
1000
x6454
1054A
Elevator or Stairs?
implementation
800
x8980
1053E
Euler tour
constructive algorithms
,
trees
3500
x196
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x377
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2688
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x881
1051D
Bicolorings
bitmasks
,
dp
1700
x7161
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9153
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x16650
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8321
1047B
Cover Points
geometry
,
math
900
x16914
1047A
Little C Loves 3 I
math
800
x19591
1046I
Say Hello
geometry
2300
x304
1046F
Splitting money
implementation
1400
x2727
1046C
Space Formula
greedy
1400
x3040
1045J
Moonwalk challenge
data structures
,
strings
,
trees
2600
x164
1045I
Palindrome Pairs
hashing
,
strings
1600
x4150
1045H
Self-exploration
math
2400
x365
1045G
AI robots
data structures
2200
x1534
1045F
Shady Lady
geometry
,
math
3400
x94
1045E
Ancient civilizations
constructive algorithms
,
geometry
3200
x120
1045D
Interstellar battle
math
,
probabilities
,
trees
2200
x636
1045C
Hyperspace Highways
dfs and similar
,
graphs
,
trees
2300
x622
1045B
Space Isaac
hashing
,
number theory
2400
x495
1045A
Last chance
data structures
,
flows
,
graph matchings
,
graphs
,
trees
2500
x322
1044F
DFS
data structures
2700
x505
1044E
Grid Sort
implementation
3100
x112
1044D
Deduction Queries
data structures
,
dsu
2400
x972
1044C
Optimal Polygon Perimeter
dp
,
geometry
2100
x1204
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1550
1044A
The Tower is Going Home
binary search
,
two pointers
1700
x2856
1043G
Speckled Band
data structures
,
divide and conquer
,
hashing
,
string suffix structures
,
strings
3500
x215
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2194
1043E
Train Hard, Win Easy
constructive algorithms
,
greedy
,
math
,
sortings
1900
x2689
1043D
Mysterious Crime
brute force
,
combinatorics
,
math
,
meet-in-the-middle
,
two pointers
1700
x4378
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x6789
1043B
Lost Array
implementation
1200
x6211
1043A
Elections
implementation
,
math
800
x10714
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1240
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1693
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x5749
1042C
Array Product
constructive algorithms
,
greedy
,
math
1700
x4633
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x15307
1042A
Benches
binary search
,
implementation
1100
x12528
1041F
Ray in the tube
data structures
,
divide and conquer
,
dp
,
math
2500
x1456
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3520
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x5840
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9294
1041B
Buying a TV Set
math
1000
x13741
1041A
Heist
greedy
,
implementation
,
sortings
800
x24580
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7019
1040A
Palindrome Dance
greedy
1000
x9349
1039E
Summer Oenothera Exhibition
data structures
3400
x265
1039D
You Are Given a Tree
data structures
,
dp
,
trees
2800
x1650
1039C
Network Safety
dfs and similar
,
dsu
,
graphs
,
math
,
sortings
2200
x1312
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2281
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x771
1038F
Wrap Around
dp
,
strings
2900
x296
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x956
1038D
Slime
dp
,
greedy
,
implementation
1800
x8136
1038C
Gambling
greedy
,
sortings
1300
x9342
1038B
Non-Coprime Partition
constructive algorithms
,
math
1100
x13150
1038A
Equality
implementation
,
strings
800
x14433
1037H
Security
data structures
,
string suffix structures
3200
x986
1037G
A Game on Strings
games
3200
x296
1037F
Maximum Reduction
combinatorics
,
data structures
,
math
2500
x934
1037E
Trips
graphs
2200
x2708
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13927
1037C
Equalize
dp
,
greedy
,
strings
1300
x18362
1037B
Reach Median
greedy
1300
x10209
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x10963
1036G
Sources and Sinks
bitmasks
,
brute force
,
dfs and similar
2700
x361
1036F
Relatively Prime Powers
combinatorics
,
math
,
number theory
2400
x1377
1036E
Covered Points
fft
,
geometry
,
number theory
2400
x1416
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x8991
1036C
Classy Numbers
combinatorics
,
dp
1900
x8678
1036B
Diagonal Walking v.2
math
1600
x5623
1036A
Function Height
math
1000
x10042
1034E
Little C Loves 3 III
bitmasks
,
dp
,
math
3200
x602
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x432
1034C
Region Separation
combinatorics
,
dp
,
number theory
,
trees
2700
x854
1034B
Little C Loves 3 II
brute force
,
constructive algorithms
,
flows
,
graph matchings
2200
x2077
1034A
Enlarge GCD
number theory
1800
x8350
1033G
Chip Game
games
3500
x357
1033F
Boolean Computer
bitmasks
,
brute force
,
fft
,
math
2800
x364
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x584
1033D
Divisors
interactive
,
math
,
number theory
2000
x2312
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5393
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Codeforces Round 948 (Div. 2)
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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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