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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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Custom test
Problems
#
Name
645G
Armistice Area Apportionment
binary search
,
geometry
3200
x112
645F
Cowslip Collections
combinatorics
,
math
,
number theory
2500
x786
645E
Intellectual Inquiry
dp
,
greedy
,
strings
2200
x1240
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2882
645C
Enduring Exodus
binary search
,
two pointers
1600
x3256
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x917
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2699
643G
Choosing Ads
data structures
3200
x984
643F
Bears and Juice
dp
,
math
,
meet-in-the-middle
2900
x700
643E
Bear and Destroying Subtrees
dp
,
math
,
probabilities
,
trees
2700
x638
643D
Bearish Fanpages
2900
x314
643C
Levels and Regions
dp
2400
x1379
643B
Bear and Two Paths
constructive algorithms
,
graphs
1600
x3168
643A
Bear and Colors
implementation
1500
x4141
641G
Little Artem and Graph
2300
x91
641F
Little Artem and 2-SAT
3000
x192
641E
Little Artem and Time Machine
data structures
2000
x3227
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1241
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x3073
641B
Little Artem and Matrix
implementation
1400
x3984
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x421
639E
Bear and Paradox
binary search
,
greedy
,
math
,
sortings
2800
x580
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x966
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1203
639B
Bear and Forgotten Tree 3
constructive algorithms
,
graphs
,
trees
1600
x6499
638D
Three-dimensional Turtle Super Computer
brute force
,
dfs and similar
,
graphs
1800
x712
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x1626
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1965
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x2003
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2423
633H
Fibonacci-ish II
data structures
,
implementation
3100
x592
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x776
633F
The Chocolate Spree
dfs and similar
,
dp
,
graphs
,
trees
2600
x968
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x583
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2797
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2758
632F
Magic Matrix
brute force
,
divide and conquer
,
graphs
,
matrices
,
trees
2400
x1078
632E
Thief in a Shop
divide and conquer
,
dp
,
fft
,
math
2400
x2757
632D
Longest Subsequence
brute force
,
math
,
number theory
2100
x3753
632C
The Smallest String Concatenation
sortings
,
strings
1700
x7748
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3991
631E
Product Sum
data structures
,
dp
,
geometry
2600
x2336
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2074
631C
Report
data structures
,
sortings
1700
x3789
630Q
Pyramids
geometry
,
math
1700
x1266
630P
Area of a Star
geometry
2100
x1122
630O
Arrow
geometry
2000
x769
630M
Turn
geometry
,
math
1800
x1155
630L
Cracking the Code
implementation
,
math
1400
x3560
630K
Indivisibility
math
,
number theory
1500
x5251
630I
Parking Lot
combinatorics
,
math
1700
x6706
630H
Benches
combinatorics
,
math
1400
x4942
630G
Challenge Pennants
combinatorics
,
math
1600
x2733
630E
A rectangle
math
1900
x2327
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x1001
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x3992
629C
Famil Door and Brackets
dp
,
strings
2000
x2797
628F
Bear and Fair Set
flows
,
graphs
2500
x768
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x885
628D
Magic Numbers
dp
2200
x5935
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x237
627E
Orchestra
two pointers
3000
x571
627D
Preorder Test
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x863
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1172
627B
Factory Repairs
data structures
1700
x2928
627A
XOR Equation
dp
,
math
1700
x4215
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x530
626F
Group Projects
dp
2400
x2857
626E
Simple Skewness
binary search
,
math
,
ternary search
2400
x1321
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2750
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4335
625E
Frog Fights
data structures
,
greedy
2800
x331
625D
Finals in arithmetic
constructive algorithms
,
implementation
,
math
2400
x632
625A
Guest From the Past
implementation
,
math
1700
x5403
623E
Transforming Sequence
combinatorics
,
dp
,
fft
,
math
3300
x548
623D
Birthday
greedy
,
math
,
probabilities
2700
x489
623C
Electric Charges
binary search
,
dp
2900
x479
623B
Array GCD
dp
,
greedy
,
number theory
2300
x2153
623A
Graph and String
constructive algorithms
,
graphs
1800
x4469
622F
The Sum of the k-th Powers
math
2600
x3817
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x2066
622D
Optimal Number Permutation
constructive algorithms
1900
x2981
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6545
621E
Wet Shark and Blocks
dp
,
matrices
2000
x2817
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x986
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x5454
620F
Xors on Segments
data structures
,
strings
,
trees
2800
x735
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5575
620D
Professor GukiZ and Two Arrays
binary search
,
two pointers
2200
x1700
620C
Pearls in a Row
greedy
1500
x6697
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x241
618F
Double Knapsack
constructive algorithms
,
two pointers
3000
x1385
618E
Robot Arm
data structures
,
geometry
2500
x644
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1717
618C
Constellation
geometry
,
implementation
1600
x4237
617E
XOR and Favorite Number
data structures
2200
x8363
617D
Polyline
constructive algorithms
,
implementation
1700
x4202
617C
Watering Flowers
implementation
1600
x4863
616F
Expensive Strings
data structures
,
sortings
,
string suffix structures
,
strings
2700
x587
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2887
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