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Contest is running
Codeforces Round 946 (Div. 3)
01:20:36
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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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Problems
#
Name
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9233
778E
Selling Numbers
dp
,
sortings
3000
x301
778D
Parquet Re-laying
constructive algorithms
2700
x485
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x865
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2261
778A
String Game
binary search
,
greedy
,
strings
1700
x11131
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3872
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4917
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6283
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9351
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10052
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x330
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x415
776E
The Holmes Children
math
,
number theory
2100
x2103
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x4847
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5746
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x19432
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11847
775A
University Schedule
*special problem
2900
774L
Bars
*special problem
,
binary search
2000
x323
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1256
774J
Stepan's Series
*special problem
,
dp
2000
x353
774I
Composing Of String
*special problem
,
dp
2300
x100
774H
Repairing Of String
*special problem
,
constructive algorithms
2200
x254
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x173
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x206
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1906
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4030
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
774A
Amusement Park
*special problem
,
ternary search
2100
x294
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x184
773E
Blog Post Rating
data structures
,
sortings
3000
x318
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x565
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x937
773B
Dynamic Problem Scoring
brute force
,
greedy
2000
x1143
773A
Success Rate
binary search
,
math
1700
x4374
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x122
772D
Varying Kibibits
bitmasks
,
dp
2700
x572
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1189
772B
Volatile Kite
geometry
1800
x3095
772A
Voltage Keepsake
binary search
,
math
1800
x4077
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x78
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x441
771D
Bear and Company
dp
2500
x1106
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2796
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6632
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14662
770D
Draw Brackets!
*special problem
,
implementation
1400
x1568
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2537
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2734
770A
New Password
*special problem
,
implementation
800
x18829
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2214
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2118
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3238
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5574
768G
The Winds of Winter
binary search
,
data structures
3300
x353
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x998
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2648
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2778
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3771
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5849
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x26248
767E
Change-free
greedy
2400
x948
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2195
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3984
767B
The Queue
brute force
,
greedy
2100
x2109
767A
Snacktower
data structures
,
implementation
1100
x19312
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2850
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3271
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4321
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x31243
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x29043
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x81
765F
Souvenirs
data structures
3100
x1860
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1246
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2443
765C
Table Tennis Game 2
math
1200
x6848
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7030
765A
Neverending competitions
implementation
,
math
900
x8867
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11630
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16053
763E
Timofey and our friends animals
data structures
,
divide and conquer
,
dsu
2900
x475
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x514
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x704
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2576
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10142
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x345
762E
Radio stations
binary search
,
data structures
2200
x1289
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1292
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2368
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7518
762A
k-th divisor
math
,
number theory
1400
x18163
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x404
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1904
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3944
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5840
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6810
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14341
760B
Frodo and pillows
binary search
,
greedy
1500
x6091
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