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Before contest
Codeforces Round 974 (Div. 3)
14:29:07
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
774A
Amusement Park
*special problem
,
ternary search
2100
x302
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x188
773E
Blog Post Rating
data structures
,
sortings
3000
x387
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x654
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x957
773B
Dynamic Problem Scoring
brute force
,
greedy
2000
x1165
773A
Success Rate
binary search
,
math
1700
x4438
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x137
772D
Varying Kibibits
bitmasks
,
dp
2700
x591
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1377
772B
Volatile Kite
geometry
1800
x3300
772A
Voltage Keepsake
binary search
,
math
1800
x4344
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x81
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x487
771D
Bear and Company
dp
2500
x1313
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x3112
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6889
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x15211
770D
Draw Brackets!
*special problem
,
implementation
1400
x1571
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2615
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2812
770A
New Password
*special problem
,
implementation
800
x19733
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2327
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2257
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3284
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5703
768G
The Winds of Winter
binary search
,
data structures
3300
x357
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x1019
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2939
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2923
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3791
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5960
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x27323
767E
Change-free
greedy
2400
x963
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2228
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x4126
767B
The Queue
brute force
,
greedy
2100
x2121
767A
Snacktower
data structures
,
implementation
1100
x20101
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2984
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3375
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4379
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x32629
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x30297
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x85
765F
Souvenirs
data structures
3100
x2017
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1276
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2468
765C
Table Tennis Game 2
math
1200
x6933
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7108
765A
Neverending competitions
implementation
,
math
900
x8984
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11807
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16242
763E
Timofey and our friends animals
data structures
,
divide and conquer
,
dsu
2900
x502
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x551
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x708
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2805
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10512
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x375
762E
Radio stations
binary search
,
data structures
2200
x1363
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1550
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2478
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x8019
762A
k-th divisor
math
,
number theory
1400
x19519
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x411
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2100
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3965
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5867
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6842
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14474
760B
Frodo and pillows
binary search
,
greedy
1500
x6494
760A
Petr and a calendar
implementation
,
math
800
x8184
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x628
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x478
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2708
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3866
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10185
758A
Holiday Of Equality
implementation
,
math
800
x60409
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x500
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1153
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1317
757D
Felicity's Big Secret Revealed
bitmasks
,
dp
2200
x1398
757C
Felicity is Coming!
data structures
,
hashing
,
sortings
,
strings
1900
x2333
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x10198
757A
Gotta Catch Em' All!
implementation
1000
x11218
756F
Long number
expression parsing
,
math
,
number theory
3400
x92
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x163
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x1001
756C
Nikita and stack
data structures
2200
x1343
756B
Travel Card
binary search
,
dp
1600
x3460
756A
Pavel and barbecue
constructive algorithms
,
dfs and similar
1700
x3025
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x908
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1343
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x842
755D
PolandBall and Polygon
data structures
2000
x2488
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x12305
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11137
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17963
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x496
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2457
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x928
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