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Name
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3551
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7099
320A
Magic Numbers
brute force
,
greedy
900
x33782
319E
Ping-Pong
data structures
3000
x632
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x613
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4753
319B
Psychos in a Line
data structures
,
implementation
1900
x4028
319A
Malek Dance Club
combinatorics
,
math
1600
x2757
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7379
318A
Even Odds
math
900
x106617
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x152
317D
Game with Powers
dp
,
games
2300
x974
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x490
317B
Ants
brute force
,
implementation
2000
x1547
317A
Perfect Pair
brute force
1600
x4533
316G3
Good Substrings
string suffix structures
2400
x488
316G2
Good Substrings
string suffix structures
2200
x466
316G1
Good Substrings
hashing
,
strings
1700
x930
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x163
316F2
Suns and Rays
2300
x149
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x164
316E3
Summer Homework
data structures
,
math
2300
x504
316E2
Summer Homework
data structures
,
math
2300
x380
316E1
Summer Homework
brute force
,
data structures
1500
x1447
316D3
PE Lesson
dp
,
math
2400
x535
316D2
PE Lesson
dp
2300
x419
316D1
PE Lesson
brute force
,
dp
2300
x481
316C2
Tidying Up
flows
,
graph matchings
2300
x616
316C1
Tidying Up
flows
2200
x546
316B2
EKG
dfs and similar
,
dp
1600
x1569
316B1
EKG
brute force
,
dfs and similar
1500
x1361
316A2
Special Task
math
1400
x2100
316A1
Special Task
greedy
1100
x2592
315B
Sereja and Array
implementation
1200
x6849
315A
Sereja and Bottles
brute force
1400
x10725
314E
Sereja and Squares
dp
2900
x364
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x515
314C
Sereja and Subsequences
data structures
,
dp
2000
x1764
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1454
314A
Sereja and Contest
implementation
1600
x2058
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x541
313D
Ilya and Roads
dp
2100
x1425
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5526
313B
Ilya and Queries
dp
,
implementation
1100
x41620
313A
Ilya and Bank Account
implementation
,
number theory
900
x53741
312B
Archer
math
,
probabilities
1300
x11080
312A
Whose sentence is it?
implementation
,
strings
1100
x4861
311E
Biologist
flows
2300
x1054
311D
Interval Cubing
data structures
,
math
2600
x659
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x475
311B
Cats Transport
data structures
,
dp
2400
x3227
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x3996
309E
Sheep
binary search
,
greedy
2900
x217
309D
Tennis Rackets
brute force
,
geometry
2700
x172
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1291
309B
Context Advertising
dp
,
two pointers
2100
x499
309A
Morning run
binary search
,
math
,
two pointers
2000
x459
306D
Polygon
constructive algorithms
,
geometry
2300
x261
306C
White, Black and White Again
combinatorics
,
number theory
2100
x441
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
306A
Candies
implementation
800
x6601
305E
Playing with String
games
2300
x601
305D
Olya and Graph
combinatorics
,
math
2200
x453
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2419
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2032
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4625
304B
Calendar
brute force
,
implementation
1300
x2920
304A
Pythagorean Theorem II
brute force
,
math
1200
x10125
303E
Random Ranking
dp
,
math
,
probabilities
3000
x312
303D
Rotatable Number
math
,
number theory
2600
x278
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x854
303B
Rectangle Puzzle II
implementation
,
math
1700
x1330
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7701
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7796
302A
Eugeny and Array
implementation
800
x8925
301E
Yaroslav and Arrangements
dp
2800
x358
301D
Yaroslav and Divisors
data structures
2200
x2209
301C
Yaroslav and Algorithm
constructive algorithms
2500
x460
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2119
301A
Yaroslav and Sequence
constructive algorithms
1800
x3043
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1027
300D
Painting Square
dp
,
fft
2300
x738
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x8890
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6114
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x21935
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5132
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7762
298B
Sail
brute force
,
greedy
,
implementation
1200
x13565
298A
Snow Footprints
greedy
,
implementation
1300
x10514
297E
Mystic Carvings
data structures
3000
x353
297D
Color the Carpet
constructive algorithms
2500
x497
297C
Splitting the Uniqueness
constructive algorithms
2400
x928
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3444
297A
Parity Game
constructive algorithms
1700
x3584
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2080
296A
Yaroslav and Permutations
greedy
,
math
1100
x22025
295E
Yaroslav and Points
data structures
2500
x649
295D
Greg and Caves
combinatorics
,
dp
2400
x636
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1659
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x13147
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dfs and similar
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dp
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games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
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shortest paths
sortings
string suffix structures
strings
ternary search
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two pointers
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