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Codeforces Round #793 (Div. 2)
09:17:10
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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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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x300485
71A
Way Too Long Words
strings
800
x220192
231A
Team
brute force
,
greedy
800
x180782
1A
Theatre Square
math
1000
x171848
158A
Next Round
*special problem
,
implementation
800
x150184
50A
Domino piling
greedy
,
math
800
x143304
282A
Bit++
implementation
800
x139964
263A
Beautiful Matrix
implementation
800
x138572
112A
Petya and Strings
implementation
,
strings
800
x133972
118A
String Task
implementation
,
strings
1000
x126540
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x125212
281A
Word Capitalization
implementation
,
strings
800
x121761
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x115726
266A
Stones on the Table
implementation
800
x114207
791A
Bear and Big Brother
implementation
800
x105212
69A
Young Physicist
implementation
,
math
1000
x101849
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x101443
96A
Football
implementation
,
strings
900
x100660
617A
Elephant
math
800
x98445
59A
Word
implementation
,
strings
800
x96503
977A
Wrong Subtraction
implementation
800
x95195
116A
Tram
implementation
800
x87232
110A
Nearly Lucky Number
implementation
800
x86464
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x85714
58A
Chat room
greedy
,
strings
1000
x84400
41A
Translation
implementation
,
strings
800
x83326
734A
Anton and Danik
implementation
,
strings
800
x83224
122A
Lucky Division
brute force
,
number theory
1000
x81105
271A
Beautiful Year
brute force
800
x80229
677A
Vanya and Fence
implementation
800
x78832
160A
Twins
greedy
,
sortings
900
x77591
467A
George and Accommodation
implementation
800
x73243
136A
Presents
implementation
800
x71628
1030A
In Search of an Easy Problem
implementation
800
x71412
344A
Magnets
implementation
800
x71048
133A
HQ9+
implementation
900
x70500
318A
Even Odds
math
900
x68285
486A
Calculating Function
implementation
,
math
800
x67816
200B
Drinks
implementation
,
math
800
x67199
61A
Ultra-Fast Mathematician
implementation
800
x67001
705A
Hulk
implementation
800
x65341
228A
Is your horseshoe on the other hoof?
implementation
800
x63151
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x61218
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x61174
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x60866
479A
Expression
brute force
,
math
1000
x60753
469A
I Wanna Be the Guy
greedy
,
implementation
800
x60234
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x59095
131A
cAPS lOCK
implementation
,
strings
1000
x58970
144A
Arrival of the General
implementation
800
x58540
208A
Dubstep
strings
900
x58403
1328A
Divisibility Problem
math
800
x57221
443A
Anton and Letters
constructive algorithms
,
implementation
800
x55564
337A
Puzzles
greedy
900
x55314
520A
Pangram
implementation
,
strings
800
x54818
25A
IQ test
brute force
1300
x54687
268A
Games
brute force
800
x54452
996A
Hit the Lottery
dp
,
greedy
800
x53070
785A
Anton and Polyhedrons
implementation
,
strings
800
x52129
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x52107
1335A
Candies and Two Sisters
math
800
x51438
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x50064
230A
Dragons
greedy
,
sortings
1000
x49650
4C
Registration System
data structures
,
hashing
,
implementation
1300
x49057
510A
Fox And Snake
implementation
800
x48098
339B
Xenia and Ringroad
implementation
1000
x47984
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x46547
451A
Game With Sticks
implementation
900
x46401
155A
I_love_\%username\%
brute force
800
x46071
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x45923
581A
Vasya the Hipster
implementation
,
math
800
x45125
427A
Police Recruits
implementation
800
x45092
1352A
Sum of Round Numbers
implementation
,
math
800
x43946
189A
Cut Ribbon
brute force
,
dp
1300
x43901
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x43720
1399A
Remove Smallest
greedy
,
sortings
800
x43432
1154A
Restoring Three Numbers
math
800
x43366
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x43332
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x41648
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x41215
466A
Cheap Travel
implementation
1200
x40643
1367A
Short Substrings
implementation
,
strings
800
x40406
455A
Boredom
dp
1500
x39502
1343B
Balanced Array
constructive algorithms
,
math
800
x39439
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x39422
758A
Holiday Of Equality
implementation
,
math
800
x38239
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x38063
313A
Ilya and Bank Account
implementation
,
number theory
900
x37589
151A
Soft Drinking
implementation
,
math
800
x37123
1512A
Spy Detected!
brute force
,
implementation
800
x36979
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x36887
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x36687
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x36542
1374A
Required Remainder
math
800
x36514
1367B
Even Array
greedy
,
math
800
x36338
579A
Raising Bacteria
bitmasks
1000
x36111
703A
Mishka and Game
implementation
800
x36098
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x36023
1360A
Minimal Square
greedy
,
math
800
x36010
1343A
Candies
brute force
,
math
900
x35970
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