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Problems
#
Name
832E
Vasya and Shifts
matrices
2600
x276
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3590
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x426
832B
Petya and Exam
implementation
,
strings
1600
x4323
832A
Sasha and Sticks
games
,
math
800
x20307
831C
Jury Marks
brute force
,
constructive algorithms
1700
x4358
831B
Keyboard Layouts
implementation
,
strings
800
x14043
831A
Unimodal Array
implementation
1000
x10018
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x271
830D
Singer House
combinatorics
,
dp
,
graphs
,
trees
2800
x793
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1180
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2785
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6527
828B
Black Square
implementation
1300
x5647
828A
Restaurant Tables
implementation
1200
x7780
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x378
827E
Rusty String
fft
,
math
,
strings
2700
x785
827D
Best Edge Weight
data structures
,
dfs and similar
,
graphs
,
trees
2700
x1054
827C
DNA Evolution
data structures
,
strings
2100
x1608
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3433
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x3935
825G
Tree Queries
dfs and similar
,
graphs
,
trees
2500
x1138
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1295
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2977
825D
Suitable Replacement
binary search
,
greedy
,
implementation
1500
x3169
825C
Multi-judge Solving
greedy
,
implementation
1600
x4345
825B
Five-In-a-Row
brute force
,
implementation
1600
x4042
825A
Binary Protocol
implementation
1100
x7520
822F
Madness
constructive algorithms
,
dfs and similar
,
trees
2500
x287
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x738
822D
My pretty girl Noora
brute force
,
dp
,
greedy
,
math
,
number theory
1800
x2949
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4517
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9312
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31560
821E
Okabe and El Psy Kongroo
dp
,
matrices
2100
x1407
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x1338
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x6569
821B
Okabe and Banana Trees
brute force
,
math
1300
x5622
821A
Okabe and Future Gadget Laboratory
implementation
800
x7935
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5078
820A
Mister B and Book Reading
implementation
900
x8017
819E
Mister B and Flight to the Moon
constructive algorithms
,
graphs
2800
x495
819D
Mister B and Astronomers
number theory
2900
x213
819C
Mister B and Beacons on Field
number theory
2900
x203
819B
Mister B and PR Shifts
data structures
,
implementation
,
math
1900
x1620
819A
Mister B and Boring Game
games
,
greedy
2200
x290
818G
Four Melodies
flows
,
graphs
2600
x615
818F
Level Generation
binary search
,
math
,
ternary search
2100
x1279
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x1859
818D
Multicolored Cars
data structures
,
implementation
1700
x3380
818C
Sofa Thief
brute force
,
implementation
2000
x1210
818B
Permutation Game
implementation
1600
x2951
818A
Diplomas and Certificates
implementation
,
math
800
x6762
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2389
817E
Choosing The Commander
bitmasks
,
data structures
,
trees
2000
x2672
817D
Imbalanced Array
data structures
,
divide and conquer
,
dsu
,
sortings
1900
x4377
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x6993
817B
Makes And The Product
combinatorics
,
implementation
,
math
,
sortings
1500
x5530
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6048
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x16292
816A
Karen and Morning
brute force
,
implementation
1000
x8879
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x216
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x590
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2448
815B
Karen and Test
brute force
,
combinatorics
,
constructive algorithms
,
math
2200
x1359
815A
Karen and Game
brute force
,
greedy
,
implementation
1700
x5570
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x636
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2123
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6281
814B
An express train to reveries
constructive algorithms
1300
x5543
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10233
813F
Bipartite Checking
data structures
,
dsu
,
graphs
2500
x1205
813E
Army Creation
binary search
,
data structures
2200
x2259
813D
Two Melodies
dp
,
flows
2600
x957
813C
The Tag Game
dfs and similar
,
graphs
1700
x5637
813B
The Golden Age
brute force
,
math
1800
x3767
813A
The Contest
implementation
1100
x5004
812E
Sagheer and Apple Tree
games
,
trees
2300
x1013
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x325
812C
Sagheer and Nubian Market
binary search
,
sortings
1500
x13044
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5066
812A
Sagheer and Crossroads
implementation
1200
x6157
811E
Vladik and Entertaining Flags
data structures
,
dsu
,
graphs
2600
x784
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1524
811C
Vladik and Memorable Trip
dp
,
implementation
1900
x3202
811B
Vladik and Complicated Book
implementation
,
sortings
1200
x6424
811A
Vladik and Courtesy
brute force
,
implementation
800
x11683
810B
Summer sell-off
greedy
,
sortings
1300
x10833
810A
Straight <<A>>
implementation
,
math
900
x8698
809E
Surprise me!
divide and conquer
,
math
,
number theory
,
trees
3100
x710
809D
Hitchhiking in the Baltic States
data structures
,
dp
2900
x750
809C
Find a car
combinatorics
,
divide and conquer
,
dp
2600
x724
809B
Glad to see you!
binary search
,
interactive
2200
x1436
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4647
808G
Anthem of Berland
dp
,
strings
2300
x2385
808F
Card Game
binary search
,
flows
,
graphs
2400
x1064
808E
Selling Souvenirs
binary search
,
dp
,
greedy
,
ternary search
2300
x1747
808D
Array Division
binary search
,
data structures
,
implementation
1900
x6709
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x5950
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6550
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binary search
bitmasks
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data structures
dfs and similar
divide and conquer
dp
dsu
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fft
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games
geometry
graph matchings
graphs
greedy
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implementation
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math
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number theory
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strings
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trees
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