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Problems
#
Name
418E
Tricky Password
data structures
3100
x294
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x468
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x780
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2375
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4609
417B
Crash
implementation
1400
x1749
417A
Elimination
dp
,
implementation
,
math
1500
x2878
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1391
416D
Population Size
greedy
,
implementation
,
math
2400
x902
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7650
416B
Art Union
brute force
,
dp
,
implementation
1300
x8533
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8669
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6125
415A
Mashmokh and Lights
implementation
900
x8797
414E
Mashmokh's Designed Problem
data structures
3200
x191
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x674
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2175
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x20933
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9649
413E
Maze 2D
data structures
,
divide and conquer
2200
x670
413D
2048
bitmasks
,
dp
2000
x750
413C
Jeopardy!
greedy
,
math
1400
x2305
413B
Spyke Chatting
implementation
1300
x1679
413A
Data Recovery
implementation
1200
x2540
412E
E-mail Addresses
implementation
1900
x808
412D
Giving Awards
dfs and similar
2000
x1813
412C
Pattern
implementation
,
strings
1200
x3855
412B
Network Configuration
greedy
,
sortings
900
x5279
412A
Poster
greedy
,
implementation
900
x4312
411C
Kicker
implementation
1700
x1035
411B
Multi-core Processor
implementation
1600
x1253
411A
Password Check
*special problem
,
implementation
800
x6998
409I
Feed the Golorp
*special problem
2400
x116
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8692
409G
On a plane
*special problem
,
geometry
2200
x500
409F
000001
*special problem
1900
x2043
409E
Dome
*special problem
1800
x562
409D
Big Data
*special problem
1700
x1695
409C
Magnum Opus
*special problem
1700
x1945
409B
Mysterious Language
*special problem
1700
x1342
409A
The Great Game
*special problem
1700
x2435
408B
Garland
implementation
1200
x8888
408A
Line to Cashier
implementation
900
x11015
407E
k-d-sequence
data structures
3100
x687
407D
Largest Submatrix 3
dp
,
hashing
2700
x540
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x955
407B
Long Path
dp
,
implementation
1600
x6416
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4751
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x228
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x1130
405E
Graph Cutting
dfs and similar
,
graphs
2300
x1335
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3089
405C
Unusual Product
implementation
,
math
1600
x4571
405B
Domino Effect
1100
x5629
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94895
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x562
404D
Minesweeper 1D
dp
,
implementation
1900
x2063
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5011
404B
Marathon
implementation
,
math
1500
x2895
404A
Valera and X
implementation
1000
x22982
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x201
403D
Beautiful Pairs of Numbers
combinatorics
,
dp
2300
x1067
402E
Strictly Positive Matrix
graphs
,
math
2200
x2082
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2520
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5703
402B
Trees in a Row
brute force
,
implementation
1400
x3689
402A
Nuts
greedy
,
math
1100
x4515
401E
Olympic Games
math
2500
x167
401D
Roman and Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
number theory
2000
x3974
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19298
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4385
401A
Vanya and Cards
implementation
,
math
800
x15881
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x934
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2802
400C
Inna and Huge Candy Matrix
implementation
,
math
1500
x2872
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7352
400A
Inna and Choose Options
implementation
1000
x6405
399B
Red and Blue Balls
x1817
399A
Pages
implementation
x4077
398E
Sorting Permutations
x88
398D
Instant Messanger
data structures
x835
398C
Tree and Array
constructive algorithms
x207
398B
Painting The Wall
dp
,
probabilities
x994
398A
Cards
constructive algorithms
,
implementation
x910
397B
On Corruption and Numbers
constructive algorithms
,
implementation
,
math
x735
397A
On Segment's Own Points
implementation
x2588
396E
On Iteration of One Well-Known Function
math
x144
396D
On Sum of Number of Inversions in Permutations
combinatorics
,
math
x406
396C
On Changing Tree
data structures
,
graphs
,
trees
x1527
396B
On Sum of Fractions
math
,
number theory
x1044
396A
On Number of Decompositions into Multipliers
combinatorics
,
math
,
number theory
x1461
394E
Lightbulb for Minister
geometry
x114
394D
Physical Education and Buns
brute force
,
implementation
,
math
x261
394C
Dominoes
constructive algorithms
,
greedy
x511
394B
Very Beautiful Number
math
x567
394A
Counting Sticks
brute force
,
implementation
x2633
393B
Three matrices
x1933
393A
Nineteen
x6525
392E
Deleting Substrings
x173
392D
Three Arrays
data structures
x210
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Codeforces Round 946 (Div. 3)
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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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