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When submitting a solution in C++, please select either C++14 (GCC 6-32) or C++17 (GCC 7-32) as your compiler.
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Codeforces Round 936 (Div. 2)
2 days
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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
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number theory
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ternary search
trees
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Custom test
Problems
#
Name
1187F
Expected Square Beauty
dp
,
math
,
probabilities
2500
x824
1172C2
Nauuo and Pictures (hard version)
dp
,
probabilities
2600
x714
1172C1
Nauuo and Pictures (easy version)
dp
,
probabilities
2300
x973
1156F
Card Bag
dp
,
math
,
probabilities
2300
x1309
1153F
Serval and Bonus Problem
combinatorics
,
dp
,
math
,
probabilities
2600
x737
1151F
Sonya and Informatics
combinatorics
,
dp
,
matrices
,
probabilities
2300
x1116
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x311
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1952
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2750
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2540
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1557
1096E
The Top Scorer
combinatorics
,
dp
,
math
,
probabilities
2500
x850
1081G
Mergesort Strikes Back
math
,
probabilities
3200
x317
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x345
1061F
Lost Root
interactive
,
probabilities
2400
x668
1045D
Interstellar battle
math
,
probabilities
,
trees
2200
x625
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1655
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2263
1009E
Intercity Travelling
combinatorics
,
math
,
probabilities
2000
x2865
989E
A Trance of Nightfall
dp
,
geometry
,
matrices
,
probabilities
2700
x226
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1782
952D
I'm Feeling Lucky!
probabilities
1800
x2373
949F
Astronomy
geometry
,
probabilities
3300
x56
935D
Fafa and Ancient Alphabet
math
,
probabilities
1900
x2504
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2570
913H
Don't Exceed
math
,
probabilities
3400
x121
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x598
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1927
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2218
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3076
895E
Eyes Closed
data structures
,
probabilities
2300
x900
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1167
859D
Third Month Insanity
dp
,
probabilities
,
trees
2100
x843
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2169
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2122
840D
Destiny
data structures
,
probabilities
2500
x2697
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15635
802F
Marmots (hard)
math
,
probabilities
2800
x119
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x988
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2707
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x979
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2004
717H
Pokermon League challenge
math
,
probabilities
2400
x413
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1319
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x590
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1234
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1231
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3366
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x307
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x1884
662A
Gambling Nim
bitmasks
,
math
,
matrices
,
probabilities
2400
x410
643E
Bear and Destroying Subtrees
dp
,
math
,
probabilities
,
trees
2700
x570
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1044
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x566
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x962
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2638
623D
Birthday
greedy
,
math
,
probabilities
2700
x464
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x5253
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x213
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1297
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1278
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x668
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x416
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x512
540D
Bad Luck Island
dp
,
probabilities
1900
x5098
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x6608
513G2
Inversions problem
dp
,
probabilities
2400
x621
513C
Second price auction
bitmasks
,
probabilities
2000
x1513
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1137
494C
Helping People
dp
,
probabilities
2600
x811
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x861
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x28614
464D
World of Darkraft - 2
dp
,
probabilities
2700
x649
457D
Bingo!
combinatorics
,
math
,
probabilities
2700
x261
453A
Little Pony and Expected Maximum
probabilities
1600
x9825
452C
Magic Trick
combinatorics
,
math
,
probabilities
2100
x1385
446D
DZY Loves Games
math
,
matrices
,
probabilities
2800
x366
444B
DZY Loves FFT
probabilities
2300
x1012
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x4827
441E
Valera and Number
bitmasks
,
dp
,
math
,
probabilities
2400
x658
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x121
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x730
398B
Painting The Wall
dp
,
probabilities
x987
364D
Ghd
brute force
,
math
,
probabilities
2900
x1935
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2260
345A
Expecting Trouble
*special problem
,
probabilities
1500
x472
335E
Counting Skyscrapers
dp
,
math
,
probabilities
2800
x202
312B
Archer
math
,
probabilities
1300
x10946
303E
Random Ranking
dp
,
math
,
probabilities
3000
x299
293D
Ksusha and Square
geometry
,
math
,
probabilities
,
two pointers
2700
x231
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x3402
277D
Google Code Jam
dp
,
probabilities
2800
x322
268E
Playlist
math
,
probabilities
,
sortings
2100
x968
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1355
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1200
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x553
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3269
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x443
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1061
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x388
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