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Codeforces Round (Div. 3)
41:37:49
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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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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x480162
71A
Way Too Long Words
strings
800
x352645
231A
Team
brute force
,
greedy
800
x298413
1A
Theatre Square
math
1000
x245265
282A
Bit++
implementation
800
x235422
158A
Next Round
*special problem
,
implementation
800
x231915
50A
Domino piling
greedy
,
math
800
x228166
263A
Beautiful Matrix
implementation
800
x224051
112A
Petya and Strings
implementation
,
strings
800
x208636
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197733
281A
Word Capitalization
implementation
,
strings
800
x195599
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192698
118A
String Task
implementation
,
strings
1000
x180876
791A
Bear and Big Brother
implementation
800
x178318
266A
Stones on the Table
implementation
800
x177603
617A
Elephant
math
800
x169626
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x167132
59A
Word
implementation
,
strings
800
x161542
69A
Young Physicist
implementation
,
math
1000
x154695
977A
Wrong Subtraction
implementation
800
x154446
96A
Football
implementation
,
strings
900
x148736
110A
Nearly Lucky Number
implementation
800
x142128
734A
Anton and Danik
implementation
,
strings
800
x139758
41A
Translation
implementation
,
strings
800
x134547
116A
Tram
implementation
800
x131742
677A
Vanya and Fence
implementation
800
x130238
271A
Beautiful Year
brute force
800
x127200
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126452
58A
Chat room
greedy
,
strings
1000
x121936
1030A
In Search of an Easy Problem
implementation
800
x119566
122A
Lucky Division
brute force
,
number theory
1000
x115734
467A
George and Accommodation
implementation
800
x113445
344A
Magnets
implementation
800
x111443
160A
Twins
greedy
,
sortings
900
x110586
486A
Calculating Function
implementation
,
math
800
x109083
136A
Presents
implementation
800
x108831
200B
Drinks
implementation
,
math
800
x107471
318A
Even Odds
math
900
x105898
61A
Ultra-Fast Mathematician
implementation
800
x103357
228A
Is your horseshoe on the other hoof?
implementation
800
x101679
133A
HQ9+
implementation
900
x99765
705A
Hulk
implementation
800
x99182
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94177
1328A
Divisibility Problem
math
800
x93024
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91113
520A
Pangram
implementation
,
strings
800
x89535
144A
Arrival of the General
implementation
800
x88756
479A
Expression
brute force
,
math
1000
x88413
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86921
996A
Hit the Lottery
dp
,
greedy
800
x83988
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83767
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83691
208A
Dubstep
strings
900
x83360
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82294
785A
Anton and Polyhedrons
implementation
,
strings
800
x81972
131A
cAPS lOCK
implementation
,
strings
1000
x81055
25A
IQ test
brute force
1300
x80915
268A
Games
brute force
800
x80732
1335A
Candies and Two Sisters
math
800
x78444
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77715
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76895
510A
Fox And Snake
implementation
800
x76764
337A
Puzzles
greedy
900
x75390
230A
Dragons
greedy
,
sortings
1000
x74138
427A
Police Recruits
implementation
800
x72274
1352A
Sum of Round Numbers
implementation
,
math
800
x71639
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70977
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70659
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70540
155A
I_love_\%username\%
brute force
800
x70444
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69691
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67105
581A
Vasya the Hipster
implementation
,
math
800
x66980
339B
Xenia and Ringroad
implementation
1000
x66272
1154A
Restoring Three Numbers
math
800
x66217
151A
Soft Drinking
implementation
,
math
800
x65557
1742A
Sum
implementation
800
x64301
1399A
Remove Smallest
greedy
,
sortings
800
x62586
451A
Game With Sticks
implementation
900
x62504
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62362
189A
Cut Ribbon
brute force
,
dp
1300
x62323
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62316
630A
Again Twenty Five!
number theory
800
x61777
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60124
1512A
Spy Detected!
brute force
,
implementation
800
x59763
1692A
Marathon
implementation
800
x59429
466A
Cheap Travel
implementation
1200
x59402
32B
Borze
expression parsing
,
implementation
800
x58507
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58192
1676A
Lucky?
implementation
800
x57745
758A
Holiday Of Equality
implementation
,
math
800
x57129
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56894
1669A
Division?
implementation
800
x56818
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56535
579A
Raising Bacteria
bitmasks
1000
x55921
1560A
Dislike of Threes
implementation
800
x55721
1807A
Plus or Minus
implementation
800
x55416
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55380
1475A
Odd Divisor
math
,
number theory
900
x54941
1367A
Short Substrings
implementation
,
strings
800
x54740
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