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Codeforces Round 986 (Div. 2)
07:49:27
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Difficulty:
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math
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
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x217
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x189
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x961
773A
Success Rate
binary search
,
math
1700
x4458
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1386
772A
Voltage Keepsake
binary search
,
math
1800
x4365
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2822
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x1028
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2959
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x3027
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x33116
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x86
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2486
765C
Table Tennis Game 2
math
1200
x6981
765A
Neverending competitions
implementation
,
math
900
x9027
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16360
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x712
762A
k-th divisor
math
,
number theory
1400
x20031
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6874
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14538
760A
Petr and a calendar
implementation
,
math
800
x8213
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x637
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2734
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3885
758A
Holiday Of Equality
implementation
,
math
800
x61494
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x10299
756F
Long number
expression parsing
,
math
,
number theory
3400
x99
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x176
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x918
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x18123
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x9088
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6564
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x76235
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x49763
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4626
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x9002
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x422
747A
Display Size
brute force
,
math
800
x10278
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1741
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x5117
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3729
746A
Compote
implementation
,
math
800
x21553
743C
Vladik and fractions
brute force
,
constructive algorithms
,
math
,
number theory
1500
x12353
742B
Arpa’s obvious problem and Mehrdad’s terrible solution
brute force
,
math
,
number theory
1500
x9301
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x42948
741A
Arpa's loud Owf and Mehrdad's evil plan
dfs and similar
,
math
1600
x5437
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2196
737F
Dirty plates
constructive algorithms
,
math
3300
x70
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x187
736D
Permutations
math
,
matrices
2800
x464
735D
Taxes
math
,
number theory
1600
x13577
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7527
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1301
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x29448
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x927
733B
Parade
math
1100
x10682
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9748
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x73046
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2876
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x883
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3769
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7461
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13993
725B
Food on the Plane
implementation
,
math
1200
x5142
724G
Xor-matic Number of the Graph
bitmasks
,
graphs
,
math
,
number theory
,
trees
2600
x1075
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2145
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4015
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x79345
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2355
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12099
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3895
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4401
717H
Pokermon League challenge
math
,
probabilities
2400
x423
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x369
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x356
715A
Plus and Square Root
constructive algorithms
,
math
1600
x5624
714A
Meeting of Old Friends
implementation
,
math
1100
x10793
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x618
712D
Memory and Scores
combinatorics
,
dp
,
math
2200
x1841
712C
Memory and De-Evolution
greedy
,
math
1600
x5848
712A
Memory and Crow
implementation
,
math
800
x11908
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1276
711D
Directed Roads
combinatorics
,
dfs and similar
,
graphs
,
math
1900
x4494
710D
Two Arithmetic Progressions
math
,
number theory
2500
x1353
710C
Magic Odd Square
constructive algorithms
,
math
1500
x5123
708E
Student's Camp
dp
,
math
3100
x1001
708B
Recover the String
constructive algorithms
,
greedy
,
implementation
,
math
1900
x3246
707C
Pythagorean Triples
math
,
number theory
1500
x12688
705B
Spider Man
games
,
math
1100
x9165
704C
Black Widow
dp
,
graphs
,
implementation
,
math
2900
x463
703B
Mishka and trip
implementation
,
math
1400
x5680
702D
Road to Post Office
math
1900
x3370
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11946
701B
Cells Not Under Attack
data structures
,
math
1200
x11788
700A
As Fast As Possible
binary search
,
math
1900
x3189
698D
Limak and Shooting Points
brute force
,
geometry
,
math
2600
x541
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1322
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5749
697A
Pineapple Incident
implementation
,
math
900
x12812
696C
PLEASE
combinatorics
,
dp
,
implementation
,
math
,
matrices
2000
x2086
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