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Codeforces Round 973 (Div. 2)
13:41:27
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binary search
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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Name
2009G2
Yunli's Subarray Queries (hard version)
binary search
,
data structures
,
dp
2200
x911
2009G1
Yunli's Subarray Queries (easy version)
binary search
,
data structures
,
two pointers
1900
x3071
2009E
Klee's SUPER DUPER LARGE Array!!!
binary search
,
math
,
ternary search
1400
x10894
2008H
Sakurako's Test
binary search
,
brute force
,
greedy
,
math
,
number theory
2100
x2362
2008G
Sakurako's Task
binary search
,
greedy
,
math
,
number theory
1800
x4224
2008C
Longest Good Array
binary search
,
brute force
,
math
800
x26791
2005D
Alter the GCD
binary search
,
data structures
,
divide and conquer
,
implementation
,
number theory
x553
2005B2
The Strict Teacher (Hard Version)
binary search
,
greedy
,
math
,
sortings
x14005
2004F
Make a Palindrome
binary search
,
brute force
,
data structures
,
greedy
,
math
2600
x989
2004D
Colored Portals
binary search
,
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
1600
x9798
2002D2
DFS Checker (Hard Version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
2300
x2190
2001C
Guess The Tree
binary search
,
brute force
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
interactive
,
trees
1500
x10002
2000H
Ksyusha and the Loaded Set
binary search
,
brute force
,
data structures
,
implementation
2200
x1486
2000G
Call During the Journey
binary search
,
brute force
,
graphs
,
greedy
,
shortest paths
2100
x2024
1999G2
Ruler (hard version)
binary search
,
interactive
,
ternary search
1700
x6948
1999G1
Ruler (easy version)
binary search
,
interactive
1500
x9371
1998E2
Eliminating Balls With Merging (Hard Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
2500
x612
1998E1
Eliminating Balls With Merging (Easy Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
2200
x1675
1998C
Perform Operations to Maximize Score
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x5710
1997E
Level Up
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2200
x2656
1997D
Maximize the Root
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1500
x11638
1996F
Bomb
binary search
,
greedy
,
math
1900
x4331
1996D
Fun
binary search
,
brute force
,
combinatorics
,
math
,
number theory
1500
x14834
1996A
Legs
binary search
,
math
,
ternary search
800
x39819
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1700
x8279
1995B1
Bouquet (Easy Version)
binary search
,
brute force
,
greedy
,
sortings
,
two pointers
1100
x17041
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x10055
1993D
Med-imize
binary search
,
dp
,
greedy
2200
x3474
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x813
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x875
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1318
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1398
1985F
Final Boss
binary search
,
data structures
1500
x14557
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x1105
1983C
Have Your Cake and Eat It Too
binary search
,
brute force
,
greedy
,
implementation
1400
x11927
1982F
Sorting Problem Again
binary search
,
data structures
,
sortings
2600
x894
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x16737
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x1384
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x18163
1978B
New Bakery
binary search
,
greedy
,
math
,
ternary search
800
x21732
1976D
Invertible Bracket Sequences
binary search
,
combinatorics
,
data structures
,
divide and conquer
,
implementation
,
two pointers
2000
x4144
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x9980
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x2190
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x14051
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x3449
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x13586
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x9583
1971E
Find the Car
binary search
,
math
,
sortings
1500
x13714
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x1305
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1872
1968G1
Division + LCP (easy version)
binary search
,
data structures
,
dp
,
hashing
,
string suffix structures
,
strings
1900
x4099
1968F
Equal XOR Segments
binary search
,
data structures
1800
x5280
1967D
Long Way to be Non-decreasing
binary search
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
,
two pointers
2800
x630
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
1400
x12121
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x419
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x465
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x21252
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x2169
1952G
Mathematician Takeover
binary search
,
dfs and similar
,
math
x1011
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x75
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x267
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x14249
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x3015
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x10604
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x733
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x7912
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x288
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x424
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2728
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5849
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x9457
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x141
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x491
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2813
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x438
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x8080
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x8025
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6648
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x10999
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6934
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x14576
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x17063
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x20994
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x11648
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x371
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x6627
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x446
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x939
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5501
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4697
1915C
Can I Square?
binary search
,
implementation
800
x41617
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x319
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x14833
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x85
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x13920
1906D
Spaceship Exploration
binary search
,
geometry
2800
x110
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x12730
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x15075
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x612
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5626
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