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Codeforces Round 945 (Div. 2)
3 days
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*has extra registration
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Difficulty:
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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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Problems
#
Name
4A
Watermelon
brute force
,
math
800
x483061
71A
Way Too Long Words
strings
800
x354723
231A
Team
brute force
,
greedy
800
x300221
1A
Theatre Square
math
1000
x246303
282A
Bit++
implementation
800
x237124
158A
Next Round
*special problem
,
implementation
800
x233039
50A
Domino piling
greedy
,
math
800
x229383
263A
Beautiful Matrix
implementation
800
x225415
112A
Petya and Strings
implementation
,
strings
800
x209775
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x198819
281A
Word Capitalization
implementation
,
strings
800
x196671
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x193922
118A
String Task
implementation
,
strings
1000
x181668
791A
Bear and Big Brother
implementation
800
x179476
266A
Stones on the Table
implementation
800
x178523
617A
Elephant
math
800
x170655
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x168169
59A
Word
implementation
,
strings
800
x162610
69A
Young Physicist
implementation
,
math
1000
x155433
977A
Wrong Subtraction
implementation
800
x155392
96A
Football
implementation
,
strings
900
x149469
110A
Nearly Lucky Number
implementation
800
x142971
734A
Anton and Danik
implementation
,
strings
800
x140687
41A
Translation
implementation
,
strings
800
x135348
116A
Tram
implementation
800
x132437
677A
Vanya and Fence
implementation
800
x131106
271A
Beautiful Year
brute force
800
x127964
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x127107
58A
Chat room
greedy
,
strings
1000
x122447
1030A
In Search of an Easy Problem
implementation
800
x120353
122A
Lucky Division
brute force
,
number theory
1000
x116357
467A
George and Accommodation
implementation
800
x114089
344A
Magnets
implementation
800
x112125
160A
Twins
greedy
,
sortings
900
x111105
486A
Calculating Function
implementation
,
math
800
x109688
136A
Presents
implementation
800
x109418
200B
Drinks
implementation
,
math
800
x108103
318A
Even Odds
math
900
x106457
61A
Ultra-Fast Mathematician
implementation
800
x103875
228A
Is your horseshoe on the other hoof?
implementation
800
x102258
133A
HQ9+
implementation
900
x100201
705A
Hulk
implementation
800
x99634
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94686
1328A
Divisibility Problem
math
800
x93623
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91579
520A
Pangram
implementation
,
strings
800
x90073
144A
Arrival of the General
implementation
800
x89217
479A
Expression
brute force
,
math
1000
x88901
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x87294
996A
Hit the Lottery
dp
,
greedy
800
x84480
443A
Anton and Letters
constructive algorithms
,
implementation
800
x84162
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x84094
208A
Dubstep
strings
900
x83773
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82570
785A
Anton and Polyhedrons
implementation
,
strings
800
x82457
131A
cAPS lOCK
implementation
,
strings
1000
x81370
25A
IQ test
brute force
1300
x81350
268A
Games
brute force
800
x81146
1335A
Candies and Two Sisters
math
800
x78827
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x78056
4C
Registration System
data structures
,
hashing
,
implementation
1300
x77375
510A
Fox And Snake
implementation
800
x77267
337A
Puzzles
greedy
900
x75694
230A
Dragons
greedy
,
sortings
1000
x74490
427A
Police Recruits
implementation
800
x72668
1352A
Sum of Round Numbers
implementation
,
math
800
x72230
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71287
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71048
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70993
155A
I_love_\%username\%
brute force
800
x70723
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x70056
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67488
581A
Vasya the Hipster
implementation
,
math
800
x67282
1154A
Restoring Three Numbers
math
800
x66512
339B
Xenia and Ringroad
implementation
1000
x66491
151A
Soft Drinking
implementation
,
math
800
x65972
1742A
Sum
implementation
800
x64939
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62979
1399A
Remove Smallest
greedy
,
sortings
800
x62876
189A
Cut Ribbon
brute force
,
dp
1300
x62784
451A
Game With Sticks
implementation
900
x62783
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62615
630A
Again Twenty Five!
number theory
800
x62149
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60579
1692A
Marathon
implementation
800
x60122
1512A
Spy Detected!
brute force
,
implementation
800
x60074
466A
Cheap Travel
implementation
1200
x59677
32B
Borze
expression parsing
,
implementation
800
x58946
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58528
1676A
Lucky?
implementation
800
x58217
758A
Holiday Of Equality
implementation
,
math
800
x57453
1669A
Division?
implementation
800
x57374
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x57082
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56738
579A
Raising Bacteria
bitmasks
1000
x56434
1560A
Dislike of Threes
implementation
800
x56008
1807A
Plus or Minus
implementation
800
x55990
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55656
1475A
Odd Divisor
math
,
number theory
900
x55384
1791A
Codeforces Checking
implementation
,
strings
800
x55193
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