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Codeforces Round 976 (Div. 2) and Divide By Zero 9.0
14:02:25
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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
2014H
Robin Hood Archery
data structures
,
divide and conquer
,
greedy
,
hashing
1900
x2545
2014G
Milky Days
brute force
,
data structures
,
greedy
,
implementation
2200
x881
2014F
Sheriff's Defense
dfs and similar
,
dp
,
greedy
,
trees
2000
x2559
2014E
Rendez-vous de Marian et Robin
dfs and similar
,
graphs
,
shortest paths
1800
x4182
2014D
Robert Hood and Mrs Hood
brute force
,
data structures
,
greedy
,
sortings
1400
x9329
2013F2
Game in Tree (Hard Version)
binary search
,
data structures
,
trees
3500
x60
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x352
2013E
Prefix GCD
brute force
,
dp
,
greedy
,
math
,
number theory
2200
x2421
2013D
Minimize the Difference
binary search
,
greedy
1900
x4790
2013C
Password Cracking
constructive algorithms
,
interactive
,
strings
1400
x9807
2010C2
Message Transmission Error (hard version)
hashing
,
string suffix structures
,
strings
,
two pointers
1700
x2581
2010C1
Message Transmission Error (easy version)
brute force
,
strings
1400
x6015
2009G3
Yunli's Subarray Queries (extreme version)
data structures
,
dp
,
implementation
2700
x268
2009G2
Yunli's Subarray Queries (hard version)
binary search
,
data structures
,
dp
2200
x1007
2009G1
Yunli's Subarray Queries (easy version)
binary search
,
data structures
,
two pointers
1900
x3350
2009F
Firefly's Queries
bitmasks
,
data structures
,
flows
,
math
1700
x5743
2009E
Klee's SUPER DUPER LARGE Array!!!
binary search
,
math
,
ternary search
1400
x11630
2009D
Satyam and Counting
geometry
,
math
1400
x12736
2008H
Sakurako's Test
binary search
,
brute force
,
greedy
,
math
,
number theory
2100
x2545
2008G
Sakurako's Task
binary search
,
greedy
,
math
,
number theory
1800
x4555
2008F
Sakurako's Box
combinatorics
,
math
,
number theory
1400
x11432
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x8739
2007C
Dora and C++
math
,
number theory
1500
x11008
2006F
Dora's Paint
brute force
,
combinatorics
,
constructive algorithms
,
graphs
,
implementation
3500
x92
2006E
Iris's Full Binary Tree
brute force
,
data structures
,
dfs and similar
,
trees
3100
x200
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x591
2006C
Eri and Expanded Sets
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
2300
x1456
2006B
Iris and the Tree
brute force
,
data structures
,
dfs and similar
,
dsu
,
math
,
trees
1800
x2906
2006A
Iris and Game on the Tree
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
1700
x6064
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x656
2005E1
Subtangle Game (Easy Version)
dp
,
games
,
greedy
,
implementation
2100
x2307
2005D
Alter the GCD
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
number theory
2400
x696
2005C
Lazy Narek
dp
,
implementation
,
strings
1800
x6212
2004G
Substring Compression
data structures
,
dp
,
matrices
3200
x274
2004F
Make a Palindrome
binary search
,
brute force
,
data structures
,
greedy
,
math
2600
x1052
2004E
Not a Nim Problem
brute force
,
games
,
math
,
number theory
2100
x3783
2004D
Colored Portals
binary search
,
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
1600
x9995
2003F
Turtle and Three Sequences
brute force
,
data structures
,
dp
,
greedy
,
math
,
probabilities
,
two pointers
2800
x363
2003E2
Turtle and Inversions (Hard Version)
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
two pointers
2700
x472
2003E1
Turtle and Inversions (Easy Version)
brute force
,
divide and conquer
,
dp
,
greedy
,
math
2600
x665
2003D2
Turtle and a MEX Problem (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
,
implementation
,
math
2100
x3740
2003D1
Turtle and a MEX Problem (Easy Version)
greedy
,
math
1500
x10444
2002H
Counting 101
greedy
3500
x66
2002G
Lattice Optimizing
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
3400
x205
2002F2
Court Blue (Hard Version)
brute force
,
dp
,
math
,
number theory
2800
x400
2002F1
Court Blue (Easy Version)
brute force
,
dfs and similar
,
dp
,
math
,
number theory
2600
x779
2002E
Cosmic Rays
brute force
,
data structures
,
dp
2300
x2299
2002D2
DFS Checker (Hard Version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
2300
x2230
2002D1
DFS Checker (Easy Version)
brute force
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
1900
x4127
2001E2
Deterministic Heap (Hard Version)
combinatorics
,
dp
,
trees
2900
x187
2001E1
Deterministic Heap (Easy Version)
combinatorics
,
dp
,
math
,
trees
2400
x1154
2001D
Longest Max Min Subsequence
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1900
x4693
2001C
Guess The Tree
binary search
,
brute force
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
interactive
,
trees
1500
x10166
2000H
Ksyusha and the Loaded Set
binary search
,
brute force
,
data structures
,
implementation
2200
x1520
2000G
Call During the Journey
binary search
,
brute force
,
graphs
,
greedy
,
shortest paths
2100
x2094
2000F
Color Rows and Columns
dp
,
greedy
,
implementation
,
math
1900
x5045
2000E
Photoshoot for Gorillas
combinatorics
,
data structures
,
greedy
,
math
1400
x12516
1999G2
Ruler (hard version)
binary search
,
interactive
,
ternary search
1700
x7413
1999G1
Ruler (easy version)
binary search
,
interactive
1500
x9559
1999F
Expected Median
combinatorics
,
math
1500
x9685
1998E2
Eliminating Balls With Merging (Hard Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
2500
x634
1998E1
Eliminating Balls With Merging (Easy Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
2200
x1717
1998D
Determine Winning Islands in Race
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
2100
x3069
1998C
Perform Operations to Maximize Score
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x5812
1997F
Chips on a Line
brute force
,
combinatorics
,
dp
,
greedy
,
math
2700
x845
1997E
Level Up
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2200
x2702
1997D
Maximize the Root
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1500
x11807
1996G
Penacony
brute force
,
data structures
,
graphs
,
greedy
,
hashing
2200
x1548
1996F
Bomb
binary search
,
greedy
,
math
1900
x4436
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x9069
1996D
Fun
binary search
,
brute force
,
combinatorics
,
math
,
number theory
1500
x15044
1995E2
Let Me Teach You a Lesson (Hard Version)
data structures
,
dp
,
matrices
,
two pointers
2900
x287
1995E1
Let Me Teach You a Lesson (Easy Version)
2-sat
,
data structures
,
dp
,
matrices
,
two pointers
2700
x359
1995D
Cases
bitmasks
,
brute force
,
dp
,
strings
2300
x2236
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x8196
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1700
x8374
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x494
1994G
Minecraft
bitmasks
,
brute force
,
dp
,
graphs
,
math
2600
x1174
1994F
Stardew Valley
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x1114
1994E
Wooden Game
bitmasks
,
greedy
,
math
,
trees
2000
x4273
1994D
Funny Game
constructive algorithms
,
dsu
,
graphs
,
greedy
,
math
,
number theory
,
trees
1900
x5495
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x10208
1993F2
Dyn-scripted Robot (Hard Version)
chinese remainder theorem
,
math
,
number theory
2800
x373
1993F1
Dyn-scripted Robot (Easy Version)
brute force
,
chinese remainder theorem
,
constructive algorithms
,
math
,
number theory
2400
x934
1993E
Xor-Grid Problem
bitmasks
,
constructive algorithms
,
dp
,
implementation
2700
x480
1993D
Med-imize
binary search
,
dp
,
greedy
2200
x3547
1993C
Light Switches
implementation
,
math
1400
x13010
1992G
Ultra-Meow
combinatorics
,
dp
,
math
2000
x2942
1992F
Valuable Cards
brute force
,
dp
,
greedy
,
number theory
,
two pointers
1900
x5515
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x8809
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x66
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x303
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x530
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2172
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x3998
1991D
Prime XOR Coloring
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
math
,
number theory
1900
x6217
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
2800
x264
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x825
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x890
1990D
Grid Puzzle
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
1800
x6000
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