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Difficulty:
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implementation
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
Standings
Custom test
Problems
#
Name
426B
Sereja and Mirroring
implementation
1300
x3766
426A
Sereja and Mugs
implementation
800
x8988
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7330
424A
Squats
implementation
900
x8187
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x5771
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1194
420B
Online Meeting
implementation
1800
x1009
420A
Start Up
implementation
1000
x5883
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4606
417B
Crash
implementation
1400
x1749
417A
Elimination
dp
,
implementation
,
math
1500
x2874
416D
Population Size
greedy
,
implementation
,
math
2400
x902
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7632
416B
Art Union
brute force
,
dp
,
implementation
1300
x8518
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8651
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6122
415A
Mashmokh and Lights
implementation
900
x8780
413B
Spyke Chatting
implementation
1300
x1671
413A
Data Recovery
implementation
1200
x2536
412E
E-mail Addresses
implementation
1900
x808
412C
Pattern
implementation
,
strings
1200
x3849
412A
Poster
greedy
,
implementation
900
x4304
411C
Kicker
implementation
1700
x1030
411B
Multi-core Processor
implementation
1600
x1253
411A
Password Check
*special problem
,
implementation
800
x6972
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8681
408B
Garland
implementation
1200
x8863
408A
Line to Cashier
implementation
900
x10994
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x952
407B
Long Path
dp
,
implementation
1600
x6409
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4744
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x227
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3085
405C
Unusual Product
implementation
,
math
1600
x4567
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94432
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x561
404D
Minesweeper 1D
dp
,
implementation
1900
x2060
404B
Marathon
implementation
,
math
1500
x2894
404A
Valera and X
implementation
1000
x22874
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x201
402B
Trees in a Row
brute force
,
implementation
1400
x3688
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19265
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4381
401A
Vanya and Cards
implementation
,
math
800
x15870
400C
Inna and Huge Candy Matrix
implementation
,
math
1500
x2872
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7333
400A
Inna and Choose Options
implementation
1000
x6401
399A
Pages
implementation
x4076
398A
Cards
constructive algorithms
,
implementation
x910
397B
On Corruption and Numbers
constructive algorithms
,
implementation
,
math
x735
397A
On Segment's Own Points
implementation
x2586
394D
Physical Education and Buns
brute force
,
implementation
,
math
x261
394A
Counting Sticks
brute force
,
implementation
x2633
391A
Genetic Engineering
implementation
,
two pointers
x1702
390B
Inna, Dima and Song
implementation
x1167
390A
Inna and Alarm Clock
implementation
x3446
389B
Fox and Cross
greedy
,
implementation
1100
x6816
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2432
387C
George and Number
greedy
,
implementation
1700
x2157
387A
George and Sleep
implementation
900
x9513
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x411
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2086
386A
Second-Price Auction
implementation
800
x5916
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9381
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9528
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16218
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3484
384A
Coder
implementation
800
x15882
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x653
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x650
382C
Arithmetic Progression
implementation
,
sortings
1700
x8157
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x11765
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6581
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60316
380B
Sereja and Tree
graphs
,
implementation
2400
x530
379B
New Year Present
constructive algorithms
,
implementation
1200
x7160
379A
New Year Candles
implementation
1000
x44448
378B
Semifinals
implementation
,
sortings
1300
x5101
376B
I.O.U.
implementation
1300
x6095
376A
Lever
implementation
,
math
900
x9027
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x397
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x4956
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x178
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2653
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2841
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2436
373A
Collecting Beats is Fun
implementation
900
x10173
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5312
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5941
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x611
370B
Berland Bingo
implementation
1300
x2471
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6292
369A
Valera and Plates
greedy
,
implementation
900
x10710
368A
Sereja and Coat Rack
implementation
1000
x7361
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4283
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x743
366B
Dima and To-do List
brute force
,
implementation
1200
x6717
366A
Dima and Guards
implementation
1100
x4480
365B
The Fibonacci Segment
implementation
1100
x14021
365A
Good Number
implementation
1100
x17419
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