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ICPC Challenge
→ Pay attention
Before contest
Codeforces Round 914 (Div. 2)
2 days
→ Filter Problems
Difficulty:
—
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
Add tag
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Problems
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Status
Standings
Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x441867
71A
Way Too Long Words
strings
800
x323457
231A
Team
brute force
,
greedy
800
x273023
1A
Theatre Square
math
1000
x229937
158A
Next Round
*special problem
,
implementation
800
x215040
282A
Bit++
implementation
800
x211999
50A
Domino piling
greedy
,
math
800
x211074
263A
Beautiful Matrix
implementation
800
x206107
112A
Petya and Strings
implementation
,
strings
800
x192770
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x182090
281A
Word Capitalization
implementation
,
strings
800
x179933
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x176399
118A
String Task
implementation
,
strings
1000
x168741
266A
Stones on the Table
implementation
800
x163962
791A
Bear and Big Brother
implementation
800
x162638
617A
Elephant
math
800
x154747
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x153724
59A
Word
implementation
,
strings
800
x147733
69A
Young Physicist
implementation
,
math
1000
x144028
977A
Wrong Subtraction
implementation
800
x141469
96A
Football
implementation
,
strings
900
x138672
110A
Nearly Lucky Number
implementation
800
x130678
734A
Anton and Danik
implementation
,
strings
800
x127791
41A
Translation
implementation
,
strings
800
x123565
116A
Tram
implementation
800
x122548
677A
Vanya and Fence
implementation
800
x119779
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x118016
271A
Beautiful Year
brute force
800
x117357
58A
Chat room
greedy
,
strings
1000
x114047
1030A
In Search of an Easy Problem
implementation
800
x109123
122A
Lucky Division
brute force
,
number theory
1000
x108573
467A
George and Accommodation
implementation
800
x105346
160A
Twins
greedy
,
sortings
900
x103938
344A
Magnets
implementation
800
x102949
136A
Presents
implementation
800
x101339
486A
Calculating Function
implementation
,
math
800
x100621
200B
Drinks
implementation
,
math
800
x98844
318A
Even Odds
math
900
x98101
61A
Ultra-Fast Mathematician
implementation
800
x95908
228A
Is your horseshoe on the other hoof?
implementation
800
x93723
133A
HQ9+
implementation
900
x93681
705A
Hulk
implementation
800
x92343
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x87322
1328A
Divisibility Problem
math
800
x85304
469A
I Wanna Be the Guy
greedy
,
implementation
800
x84934
479A
Expression
brute force
,
math
1000
x82981
144A
Arrival of the General
implementation
800
x82550
520A
Pangram
implementation
,
strings
800
x81885
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x80994
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x78632
208A
Dubstep
strings
900
x78167
443A
Anton and Letters
constructive algorithms
,
implementation
800
x77876
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x77848
996A
Hit the Lottery
dp
,
greedy
800
x76914
131A
cAPS lOCK
implementation
,
strings
1000
x76249
25A
IQ test
brute force
1300
x75730
268A
Games
brute force
800
x75587
785A
Anton and Polyhedrons
implementation
,
strings
800
x75284
1335A
Candies and Two Sisters
math
800
x72916
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x72387
337A
Puzzles
greedy
900
x71378
4C
Registration System
data structures
,
hashing
,
implementation
1300
x70653
510A
Fox And Snake
implementation
800
x70392
230A
Dragons
greedy
,
sortings
1000
x68846
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x66550
427A
Police Recruits
implementation
800
x66518
155A
I_love_\%username\%
brute force
800
x65713
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x65530
1352A
Sum of Round Numbers
implementation
,
math
800
x65084
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x64624
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x64148
581A
Vasya the Hipster
implementation
,
math
800
x62932
339B
Xenia and Ringroad
implementation
1000
x62395
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x62334
1154A
Restoring Three Numbers
math
800
x61504
151A
Soft Drinking
implementation
,
math
800
x59315
451A
Game With Sticks
implementation
900
x59182
1399A
Remove Smallest
greedy
,
sortings
800
x58510
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x58377
189A
Cut Ribbon
brute force
,
dp
1300
x58355
466A
Cheap Travel
implementation
1200
x55513
630A
Again Twenty Five!
number theory
800
x55494
1742A
Sum
implementation
800
x55266
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x54792
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x54600
1512A
Spy Detected!
brute force
,
implementation
800
x54436
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x53713
32B
Borze
expression parsing
,
implementation
800
x53203
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x53187
758A
Holiday Of Equality
implementation
,
math
800
x53155
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x53117
1692A
Marathon
implementation
800
x52772
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x52031
1560A
Dislike of Threes
implementation
800
x51742
1367A
Short Substrings
implementation
,
strings
800
x51699
579A
Raising Bacteria
bitmasks
1000
x51556
455A
Boredom
dp
1500
x51204
1676A
Lucky?
implementation
800
x51073
1343B
Balanced Array
constructive algorithms
,
math
800
x50762
313A
Ilya and Bank Account
implementation
,
number theory
900
x50398
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