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Before contest
Codeforces Round #792 (Div. 1 + Div. 2)
08:15:03
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Difficulty:
—
probabilities
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
9A
Die Roll
math
,
probabilities
800
x31965
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x31300
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x21727
1459A
Red-Blue Shuffle
math
,
probabilities
800
x15288
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x12187
1461C
Random Events
dp
,
math
,
probabilities
1500
x9062
312B
Archer
math
,
probabilities
1300
x8964
453A
Little Pony and Expected Maximum
probabilities
1600
x8021
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x5405
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x4904
1279D
Santa's Bot
combinatorics
,
math
,
probabilities
1700
x4748
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x4580
1543C
Need for Pink Slips
bitmasks
,
brute force
,
dfs and similar
,
implementation
,
math
,
probabilities
1900
x4573
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x4368
540D
Bad Luck Island
dp
,
probabilities
1900
x4241
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x3603
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3025
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x2879
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x2733
1009E
Intercity Travelling
combinatorics
,
math
,
probabilities
2000
x2478
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x2462
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2407
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2340
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x2322
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2255
935D
Fafa and Ancient Alphabet
math
,
probabilities
1900
x2246
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x2211
77B
Falling Anvils
math
,
probabilities
1800
x2194
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2174
952D
I'm Feeling Lucky!
probabilities
1800
x2081
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2024
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x1994
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x1904
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x1867
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x1841
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x1782
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x1767
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x1764
1612E
Messages
brute force
,
dp
,
greedy
,
probabilities
,
sortings
2000
x1737
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x1729
1523D
Love-Hate
bitmasks
,
brute force
,
dp
,
probabilities
2400
x1695
840D
Destiny
data structures
,
probabilities
2500
x1649
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1618
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x1589
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x1520
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1496
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1491
30C
Shooting Gallery
dp
,
probabilities
1800
x1463
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1389
513C
Second price auction
bitmasks
,
probabilities
2000
x1386
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x1343
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1308
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1294
364D
Ghd
brute force
,
math
,
probabilities
2900
x1245
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1230
452C
Magic Trick
combinatorics
,
math
,
probabilities
2100
x1218
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1201
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1196
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1146
109B
Lucky Probability
brute force
,
probabilities
1900
x1145
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1138
1623D
Robot Cleaner Revisit
implementation
,
math
,
probabilities
2300
x1131
1599C
Bubble Strike
combinatorics
,
math
,
probabilities
,
ternary search
2000
x1127
1523E
Crypto Lights
combinatorics
,
dp
,
math
,
probabilities
2600
x1108
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1091
24D
Broken robot
dp
,
math
,
probabilities
2400
x1083
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1070
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1038
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1002
1310D
Tourism
dp
,
graphs
,
probabilities
2300
x988
1156F
Card Bag
dp
,
math
,
probabilities
2300
x969
1245E
Hyakugoku and Ladders
dp
,
probabilities
,
shortest paths
2300
x963
54C
First Digit Law
dp
,
math
,
probabilities
2000
x945
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x939
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x922
444B
DZY Loves FFT
probabilities
2300
x917
1556F
Sports Betting
bitmasks
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
2500
x914
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x907
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x882
268E
Playlist
math
,
probabilities
,
sortings
2100
x877
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x863
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x838
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x837
398B
Painting The Wall
dp
,
probabilities
x830
1151F
Sonya and Informatics
combinatorics
,
dp
,
matrices
,
probabilities
2300
x827
1172C1
Nauuo and Pictures (easy version)
dp
,
probabilities
2300
x813
1264D1
Beautiful Bracket Sequence (easy version)
combinatorics
,
dp
,
probabilities
2600
x809
1254D
Tree Queries
data structures
,
probabilities
,
trees
2700
x786
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x776
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x771
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x758
859D
Third Month Insanity
dp
,
probabilities
,
trees
2100
x752
105B
Dark Assembly
brute force
,
probabilities
1800
x733
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x709
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x700
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x699
1295F
Good Contest
combinatorics
,
dp
,
probabilities
2700
x685
895E
Eyes Closed
data structures
,
probabilities
2300
x676
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x655
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x617
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