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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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Problems
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Status
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Custom test
Problems
#
Name
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2531
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4678
417B
Crash
implementation
1400
x1792
417A
Elimination
dp
,
implementation
,
math
1500
x3027
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1510
416D
Population Size
greedy
,
implementation
,
math
2400
x951
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x8057
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8992
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6322
414E
Mashmokh's Designed Problem
data structures
3200
x200
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x687
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2226
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x22618
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9851
413E
Maze 2D
data structures
,
divide and conquer
2200
x744
413D
2048
bitmasks
,
dp
2000
x822
413C
Jeopardy!
greedy
,
math
1400
x2388
412E
E-mail Addresses
implementation
1900
x847
412D
Giving Awards
dfs and similar
2000
x1969
411C
Kicker
implementation
1700
x1229
411B
Multi-core Processor
implementation
1600
x1280
409I
Feed the Golorp
*special problem
2400
x127
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8973
409G
On a plane
*special problem
,
geometry
2200
x521
409F
000001
*special problem
1900
x2093
409E
Dome
*special problem
1800
x579
409D
Big Data
*special problem
1700
x1716
409C
Magnum Opus
*special problem
1700
x1983
409B
Mysterious Language
*special problem
1700
x1359
409A
The Great Game
*special problem
1700
x2469
407E
k-d-sequence
data structures
3100
x796
407D
Largest Submatrix 3
dp
,
hashing
2700
x679
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x1012
407B
Long Path
dp
,
implementation
1600
x6611
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4913
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x248
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x1183
405E
Graph Cutting
dfs and similar
,
graphs
2300
x1440
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3125
405C
Unusual Product
implementation
,
math
1600
x4680
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x579
404D
Minesweeper 1D
dp
,
implementation
1900
x2162
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5240
404B
Marathon
implementation
,
math
1500
x2934
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x219
403D
Beautiful Pairs of Numbers
combinatorics
,
dp
2300
x1118
402E
Strictly Positive Matrix
graphs
,
math
2200
x2201
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2626
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5959
402B
Trees in a Row
brute force
,
implementation
1400
x3821
401E
Olympic Games
math
2500
x168
401D
Roman and Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
number theory
2000
x4198
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x20079
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x972
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2918
400C
Inna and Huge Candy Matrix
implementation
,
math
1500
x2902
388E
Fox and Meteor Shower
geometry
3100
x122
388D
Fox and Perfect Sets
math
2700
x446
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3431
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2482
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11507
387E
George and Cards
binary search
,
data structures
2200
x890
387D
George and Interesting Graph
graph matchings
2200
x1021
387C
George and Number
greedy
,
implementation
1700
x2188
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x443
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x804
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2187
385E
Bear in the Field
math
,
matrices
2300
x590
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x811
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9715
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3549
383E
Vowels
combinatorics
,
divide and conquer
,
dp
2700
x3163
383D
Antimatter
dp
2300
x3036
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6552
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x697
383A
Milking cows
data structures
,
greedy
1600
x5301
382E
Ksenia and Combinatorics
combinatorics
,
dp
2600
x383
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x682
382C
Arithmetic Progression
implementation
,
sortings
1700
x8324
382B
Number Busters
binary search
,
math
2000
x1412
380E
Sereja and Dividing
data structures
2600
x307
380D
Sereja and Cinema
combinatorics
,
math
2500
x468
380C
Sereja and Brackets
data structures
,
schedules
2000
x15323
380B
Sereja and Tree
graphs
,
implementation
2400
x537
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2688
379G
New Year Cactus
dp
3100
x142
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2324
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x341
379D
New Year Letter
bitmasks
,
brute force
,
dp
2000
x1566
379C
New Year Ratings Change
greedy
,
sortings
1400
x6573
377E
Cookie Clicker
dp
,
geometry
2800
x465
377D
Developing Game
data structures
2400
x1166
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1150
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2114
377A
Maze
dfs and similar
1600
x22706
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x412
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6955
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x568
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x5079
375A
Divisible by Seven
math
,
number theory
1600
x4864
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