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→ Filter Problems
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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
316C1
Tidying Up
flows
2200
x559
316B2
EKG
dfs and similar
,
dp
1600
x1592
314E
Sereja and Squares
dp
2900
x372
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x527
314C
Sereja and Subsequences
data structures
,
dp
2000
x1840
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1519
314A
Sereja and Contest
implementation
1600
x2079
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x554
313D
Ilya and Roads
dp
2100
x1475
311E
Biologist
flows
2300
x1208
311D
Interval Cubing
data structures
,
math
2600
x673
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x486
311B
Cats Transport
data structures
,
dp
2400
x3490
309E
Sheep
binary search
,
greedy
2900
x232
309D
Tennis Rackets
brute force
,
geometry
2700
x176
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1366
309B
Context Advertising
dp
,
two pointers
2100
x719
309A
Morning run
binary search
,
math
,
two pointers
2000
x488
306D
Polygon
constructive algorithms
,
geometry
2300
x284
306C
White, Black and White Again
combinatorics
,
number theory
2100
x486
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x445
305E
Playing with String
games
2300
x634
305D
Olya and Graph
combinatorics
,
math
2200
x512
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2457
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2152
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4806
303E
Random Ranking
dp
,
math
,
probabilities
3000
x321
303D
Rotatable Number
math
,
number theory
2600
x298
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x892
303B
Rectangle Puzzle II
implementation
,
math
1700
x1347
301E
Yaroslav and Arrangements
dp
2800
x366
301D
Yaroslav and Divisors
data structures
2200
x2413
301C
Yaroslav and Algorithm
constructive algorithms
2500
x475
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2409
301A
Yaroslav and Sequence
constructive algorithms
1800
x3088
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1047
300D
Painting Square
dp
,
fft
2300
x756
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9656
297E
Mystic Carvings
data structures
3000
x376
297D
Color the Carpet
constructive algorithms
2500
x589
297C
Splitting the Uniqueness
constructive algorithms
2400
x962
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3507
297A
Parity Game
constructive algorithms
1700
x3628
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2296
295E
Yaroslav and Points
data structures
2500
x688
295D
Greg and Caves
combinatorics
,
dp
2400
x657
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1736
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x14336
294E
Shaass the Great
dp
,
trees
2300
x955
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x363
294C
Shaass and Lights
combinatorics
,
number theory
1900
x3837
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4570
293E
Close Vertices
data structures
,
divide and conquer
,
trees
2700
x1463
293D
Ksusha and Square
geometry
,
math
,
probabilities
,
two pointers
2700
x239
293C
Cube Problem
brute force
,
math
,
number theory
2400
x577
293B
Distinct Paths
brute force
,
combinatorics
2700
x871
292E
Copying Data
data structures
1900
x4180
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2449
292C
Beautiful IP Addresses
brute force
2000
x1173
291E
Tree-String Problem
*special problem
,
dfs and similar
,
hashing
,
strings
2000
x1319
291D
Parallel Programming
*special problem
,
greedy
1600
x1480
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1682
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x134
290E
HQ
*special problem
,
constructive algorithms
2500
x205
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1550
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x298
288D
Polo the Penguin and Trees
combinatorics
,
dfs and similar
,
trees
2400
x758
288C
Polo the Penguin and XOR operation
implementation
,
math
1700
x2307
287B
Pipeline
binary search
,
math
1700
x9896
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x833
286D
Tourists
data structures
,
sortings
2600
x379
286C
Main Sequence
greedy
,
implementation
2100
x1514
286B
Shifting
implementation
2200
x1119
285E
Positions in Permutations
combinatorics
,
dp
,
math
2600
x1001
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1555
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x777
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x543
283C
Coin Troubles
dp
2100
x1449
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3671
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6585
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3641
282D
Yet Another Number Game
dp
,
games
2100
x1447
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x3036
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x207
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1320
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x4152
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4741
280A
Rectangle Puzzle
geometry
2000
x1473
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1449
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x764
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8290
277E
Binary Tree on Plane
flows
,
trees
2400
x1301
277D
Google Code Jam
dp
,
probabilities
2800
x336
277C
Game
games
,
implementation
2400
x453
277B
Set of Points
constructive algorithms
,
geometry
2300
x812
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1617
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13964
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2827
274E
Mirror Room
data structures
,
implementation
3000
x313
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1043
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