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Codeforces Round 940 (Div. 2)
4 days
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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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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x477525
71A
Way Too Long Words
strings
800
x350538
231A
Team
brute force
,
greedy
800
x296652
1A
Theatre Square
math
1000
x244261
282A
Bit++
implementation
800
x233703
158A
Next Round
*special problem
,
implementation
800
x230814
50A
Domino piling
greedy
,
math
800
x227034
263A
Beautiful Matrix
implementation
800
x222708
112A
Petya and Strings
implementation
,
strings
800
x207374
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x196577
281A
Word Capitalization
implementation
,
strings
800
x194496
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x191463
118A
String Task
implementation
,
strings
1000
x180138
791A
Bear and Big Brother
implementation
800
x177103
266A
Stones on the Table
implementation
800
x176562
617A
Elephant
math
800
x168557
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166126
59A
Word
implementation
,
strings
800
x160514
69A
Young Physicist
implementation
,
math
1000
x154033
977A
Wrong Subtraction
implementation
800
x153609
96A
Football
implementation
,
strings
900
x148060
110A
Nearly Lucky Number
implementation
800
x141367
734A
Anton and Danik
implementation
,
strings
800
x138718
41A
Translation
implementation
,
strings
800
x133720
116A
Tram
implementation
800
x131154
677A
Vanya and Fence
implementation
800
x129384
271A
Beautiful Year
brute force
800
x126531
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x125943
58A
Chat room
greedy
,
strings
1000
x121462
1030A
In Search of an Easy Problem
implementation
800
x118756
122A
Lucky Division
brute force
,
number theory
1000
x115239
467A
George and Accommodation
implementation
800
x112926
344A
Magnets
implementation
800
x110787
160A
Twins
greedy
,
sortings
900
x110111
486A
Calculating Function
implementation
,
math
800
x108497
136A
Presents
implementation
800
x108298
200B
Drinks
implementation
,
math
800
x106928
318A
Even Odds
math
900
x105408
61A
Ultra-Fast Mathematician
implementation
800
x102878
228A
Is your horseshoe on the other hoof?
implementation
800
x101127
133A
HQ9+
implementation
900
x99376
705A
Hulk
implementation
800
x98650
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x93630
1328A
Divisibility Problem
math
800
x92499
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90642
520A
Pangram
implementation
,
strings
800
x88920
144A
Arrival of the General
implementation
800
x88338
479A
Expression
brute force
,
math
1000
x88057
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86585
996A
Hit the Lottery
dp
,
greedy
800
x83525
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83447
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83288
208A
Dubstep
strings
900
x82998
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x81990
785A
Anton and Polyhedrons
implementation
,
strings
800
x81522
131A
cAPS lOCK
implementation
,
strings
1000
x80757
25A
IQ test
brute force
1300
x80572
268A
Games
brute force
800
x80265
1335A
Candies and Two Sisters
math
800
x78039
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77391
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76414
510A
Fox And Snake
implementation
800
x75991
337A
Puzzles
greedy
900
x75141
230A
Dragons
greedy
,
sortings
1000
x73817
427A
Police Recruits
implementation
800
x71816
1352A
Sum of Round Numbers
implementation
,
math
800
x71151
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70693
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70290
155A
I_love_\%username\%
brute force
800
x70165
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70055
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69345
581A
Vasya the Hipster
implementation
,
math
800
x66665
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66659
339B
Xenia and Ringroad
implementation
1000
x66063
1154A
Restoring Three Numbers
math
800
x65813
151A
Soft Drinking
implementation
,
math
800
x65130
1742A
Sum
implementation
800
x63718
451A
Game With Sticks
implementation
900
x62300
1399A
Remove Smallest
greedy
,
sortings
800
x62292
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62083
189A
Cut Ribbon
brute force
,
dp
1300
x62051
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x61647
630A
Again Twenty Five!
number theory
800
x61266
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59591
1512A
Spy Detected!
brute force
,
implementation
800
x59382
466A
Cheap Travel
implementation
1200
x59118
1692A
Marathon
implementation
800
x59010
32B
Borze
expression parsing
,
implementation
800
x58201
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x57766
1676A
Lucky?
implementation
800
x57330
758A
Holiday Of Equality
implementation
,
math
800
x56843
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56674
1669A
Division?
implementation
800
x56316
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56297
579A
Raising Bacteria
bitmasks
1000
x55557
1560A
Dislike of Threes
implementation
800
x55458
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55047
1807A
Plus or Minus
implementation
800
x54918
1475A
Odd Divisor
math
,
number theory
900
x54581
1367A
Short Substrings
implementation
,
strings
800
x54477
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