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Problems
#
Name
108A
Palindromic Times
implementation
,
strings
1000
x9196
107E
Darts
geometry
,
probabilities
2700
x127
107D
Crime Management
dp
,
graphs
,
matrices
2400
x400
107C
Arrangement
bitmasks
,
dp
2400
x362
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3293
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4956
106E
Space Rescuers
geometry
,
ternary search
2100
x837
106D
Treasure Island
brute force
,
implementation
1700
x1292
106C
Buns
dp
1700
x5713
106B
Choosing Laptop
brute force
,
implementation
1000
x5944
106A
Card Game
implementation
1000
x7426
105E
Lift and Throw
brute force
2500
x180
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x135
105C
Item World
brute force
,
implementation
,
sortings
2200
x270
105B
Dark Assembly
brute force
,
probabilities
1800
x797
105A
Transmigration
implementation
1700
x1785
104A
Blackjack
implementation
800
x14860
103E
Buying Sets
flows
,
graph matchings
2900
x822
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x1989
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x937
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8540
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5870
102B
Sum of Digits
implementation
1000
x24703
102A
Clothes
brute force
1200
x2924
101E
Candies and Stones
divide and conquer
,
dp
2500
x477
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x671
101C
Vectors
implementation
,
math
2000
x685
101B
Buses
binary search
,
data structures
,
dp
1700
x2496
101A
Homework
greedy
1200
x3710
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x60
100I
Rotation
*special problem
,
geometry
,
math
1500
x340
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x109
100F
Polynom
*special problem
,
implementation
1800
x132
100E
Lamps in a Line
*special problem
,
math
1600
x266
100D
World of Mouth
*special problem
,
strings
1500
x297
100C
A+B
*special problem
,
implementation
1400
x515
100B
Friendly Numbers
*special problem
,
implementation
1500
x534
100A
Carpeting the Room
*special problem
,
implementation
1100
x892
99B
Help Chef Gerasim
implementation
,
sortings
1300
x2896
99A
Help Far Away Kingdom
strings
800
x6523
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x443
98D
Help Monks
constructive algorithms
2500
x179
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x300
98B
Help King
implementation
,
probabilities
,
trees
2200
x114
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1169
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x370
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x239
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x297
97B
Superset
constructive algorithms
,
divide and conquer
2300
x804
97A
Domino
brute force
,
implementation
2400
x250
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x14503
96A
Football
implementation
,
strings
900
x149791
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1391
95D
Horse Races
dp
,
math
2500
x415
95C
Volleyball
shortest paths
1900
x2676
95B
Lucky Numbers
dp
,
greedy
1800
x1179
95A
Hockey
implementation
,
strings
1600
x1643
94B
Friends
graphs
,
implementation
,
math
1300
x4505
94A
Restoring Password
implementation
,
strings
900
x10164
93E
Lostborn
dp
,
math
,
number theory
2600
x434
93D
Flags
dp
,
math
,
matrices
2500
x334
93C
Azembler
brute force
,
implementation
2500
x410
93B
End of Exams
greedy
1900
x901
93A
Frames
implementation
1700
x1911
92B
Binary Number
greedy
1300
x4712
92A
Chips
implementation
,
math
800
x18249
91E
Igloo Skyscraper
data structures
,
geometry
2500
x585
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x261
91C
Ski Base
combinatorics
,
dsu
,
graphs
2300
x863
91B
Queue
binary search
,
data structures
1500
x6531
91A
Newspaper Headline
greedy
,
strings
1500
x3486
90B
African Crossword
implementation
,
strings
1100
x5171
90A
Cableway
greedy
,
math
1000
x4519
89E
Fire and Ice
greedy
2900
x97
89D
Space mines
geometry
2500
x228
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x609
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x510
89A
Robbery
greedy
1800
x1453
88B
Keyboard
implementation
1500
x4376
88A
Chord
brute force
,
implementation
1200
x3740
87E
Mogohu-Rea Idol
geometry
2600
x548
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x848
87C
Interesting Game
dp
,
games
,
math
2000
x1310
87B
Vasya and Types
implementation
,
strings
1800
x1115
87A
Trains
implementation
,
math
1500
x5189
86E
Long sequence
brute force
,
math
,
matrices
2700
x179
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12589
86C
Genetic engineering
dp
,
string suffix structures
,
trees
2500
x684
86B
Tetris revisited
constructive algorithms
,
graph matchings
,
greedy
,
math
2200
x401
86A
Reflection
math
1600
x1342
85E
Guard Towers
binary search
,
dsu
,
geometry
,
graphs
,
sortings
2600
x920
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1912
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x522
85B
Embassy Queue
data structures
,
greedy
1800
x957
85A
Domino
constructive algorithms
,
implementation
1300
x1759
84C
Biathlon
binary search
,
implementation
1700
x1588
84A
Toy Army
math
,
number theory
900
x14603
83E
Two Subsequences
bitmasks
,
dp
2800
x454
83D
Numbers
dp
,
math
,
number theory
2400
x823
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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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