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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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Problems
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Status
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Custom test
Problems
#
Name
440B
Balancer
greedy
,
implementation
1600
x1990
439D
Devu and his Brother
binary search
,
sortings
,
ternary search
,
two pointers
1700
x6136
439C
Devu and Partitioning of the Array
brute force
,
constructive algorithms
,
implementation
,
number theory
1700
x3935
437D
The Child and Zoo
dsu
,
sortings
1900
x3399
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x14022
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x9561
437A
The Child and Homework
implementation
1300
x9048
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2680
436B
Om Nom and Spiders
implementation
,
math
1400
x3056
436A
Feed with Candy
greedy
1500
x3486
435C
Cardiogram
implementation
1600
x2582
435B
Pasha Maximizes
greedy
1400
x7048
433C
Ryouko's Memory Note
implementation
,
math
,
sortings
1800
x2489
432C
Prime Swaps
greedy
,
sortings
1800
x2523
431C
k-Tree
dp
,
implementation
,
trees
1600
x25843
430B
Balls Game
brute force
,
two pointers
1400
x3734
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2282
429B
Working out
dp
1600
x8750
429A
Xor-tree
dfs and similar
,
trees
1300
x10433
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x14164
426B
Sereja and Mirroring
implementation
1300
x3814
425A
Sereja and Swaps
brute force
,
sortings
1500
x3914
424C
Magic Formulas
math
1600
x5443
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x541
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1268
420B
Online Meeting
implementation
1800
x1045
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2531
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4678
417B
Crash
implementation
1400
x1792
417A
Elimination
dp
,
implementation
,
math
1500
x3027
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x8057
416B
Art Union
brute force
,
dp
,
implementation
1300
x8770
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8992
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6322
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x22615
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9851
413C
Jeopardy!
greedy
,
math
1400
x2388
413B
Spyke Chatting
implementation
1300
x1714
412E
E-mail Addresses
implementation
1900
x847
411C
Kicker
implementation
1700
x1229
411B
Multi-core Processor
implementation
1600
x1280
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8973
409F
000001
*special problem
1900
x2093
409E
Dome
*special problem
1800
x579
409D
Big Data
*special problem
1700
x1716
409C
Magnum Opus
*special problem
1700
x1983
409B
Mysterious Language
*special problem
1700
x1359
409A
The Great Game
*special problem
1700
x2469
407B
Long Path
dp
,
implementation
1600
x6611
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4912
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3125
405C
Unusual Product
implementation
,
math
1600
x4680
404D
Minesweeper 1D
dp
,
implementation
1900
x2162
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5240
404B
Marathon
implementation
,
math
1500
x2934
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2626
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5959
402B
Trees in a Row
brute force
,
implementation
1400
x3821
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x20079
400C
Inna and Huge Candy Matrix
implementation
,
math
1500
x2902
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2482
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11507
387C
George and Number
greedy
,
implementation
1700
x2188
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2187
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9715
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3549
383A
Milking cows
data structures
,
greedy
1600
x5301
382C
Arithmetic Progression
implementation
,
sortings
1700
x8324
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2688
379C
New Year Ratings Change
greedy
,
sortings
1400
x6573
378B
Semifinals
implementation
,
sortings
1300
x5254
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2114
377A
Maze
dfs and similar
1600
x22704
376B
I.O.U.
implementation
1300
x6418
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x5079
375A
Divisible by Seven
math
,
number theory
1600
x4864
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2755
374B
Inna and Nine
combinatorics
,
greedy
1500
x3328
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2487
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2647
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x13166
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5709
371C
Hamburgers
binary search
,
brute force
1600
x26827
371B
Fox Dividing Cheese
math
,
number theory
1300
x11472
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1584
370B
Berland Bingo
implementation
1300
x2527
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x10165
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6525
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2477
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4332
366C
Dima and Salad
dp
1900
x4875
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4677
363D
Renting Bikes
binary search
,
greedy
1800
x3965
363C
Fixing Typos
greedy
,
implementation
1400
x13373
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1789
362A
Two Semiknights Meet
greedy
,
math
1500
x2678
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2057
359C
Prime Number
math
,
number theory
1900
x3148
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x8071
358D
Dima and Hares
dp
,
greedy
1800
x4090
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