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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
15:07:12
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combine-tags-by-or
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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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Problems
#
Name
2003E1
Turtle and Inversions (Easy Version)
brute force
,
divide and conquer
,
dp
,
greedy
,
math
2600
x724
2003D2
Turtle and a MEX Problem (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
,
implementation
,
math
2100
x4000
2003D1
Turtle and a MEX Problem (Easy Version)
greedy
,
math
1500
x11134
2003C
Turtle and Good Pairs
constructive algorithms
,
greedy
,
sortings
,
strings
1200
x18113
2003B
Turtle and Piggy Are Playing a Game 2
games
,
greedy
,
sortings
800
x25097
2003A
Turtle and Good Strings
greedy
,
strings
800
x28910
2002H
Counting 101
greedy
3500
x73
2002G
Lattice Optimizing
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
3400
x215
2002F2
Court Blue (Hard Version)
brute force
,
dp
,
math
,
number theory
2800
x433
2002F1
Court Blue (Easy Version)
brute force
,
dfs and similar
,
dp
,
math
,
number theory
2600
x822
2002E
Cosmic Rays
brute force
,
data structures
,
dp
2300
x2437
2002D2
DFS Checker (Hard Version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
2300
x2394
2002D1
DFS Checker (Easy Version)
brute force
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
1900
x4333
2002C
Black Circles
brute force
,
geometry
,
greedy
,
math
1200
x15055
2002B
Removals Game
constructive algorithms
,
games
1000
x18833
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x19428
2001E2
Deterministic Heap (Hard Version)
combinatorics
,
dp
,
trees
2900
x223
2001E1
Deterministic Heap (Easy Version)
combinatorics
,
dp
,
math
,
trees
2400
x1276
2001D
Longest Max Min Subsequence
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1900
x5032
2001C
Guess The Tree
binary search
,
brute force
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
interactive
,
trees
1500
x10691
2001B
Generate Permutation
constructive algorithms
800
x24003
2001A
Make All Equal
greedy
,
implementation
800
x29540
2000H
Ksyusha and the Loaded Set
binary search
,
brute force
,
data structures
,
implementation
2200
x1655
2000G
Call During the Journey
binary search
,
brute force
,
graphs
,
greedy
,
shortest paths
2100
x2349
2000F
Color Rows and Columns
dp
,
greedy
,
implementation
,
math
1900
x5396
2000E
Photoshoot for Gorillas
combinatorics
,
data structures
,
greedy
,
math
1400
x13268
2000D
Right Left Wrong
greedy
,
implementation
,
two pointers
1200
x22996
2000C
Numeric String Template
data structures
,
strings
1000
x25399
2000B
Seating in a Bus
two pointers
800
x33793
2000A
Primary Task
implementation
,
math
,
strings
800
x37329
1999G2
Ruler (hard version)
binary search
,
interactive
,
ternary search
1700
x7889
1999G1
Ruler (easy version)
binary search
,
interactive
1500
x10352
1999F
Expected Median
combinatorics
,
math
1500
x10408
1999E
Triple Operations
dp
,
implementation
,
math
1300
x18661
1999D
Slavic's Exam
greedy
,
implementation
,
strings
1100
x26991
1999C
Showering
greedy
,
implementation
800
x35083
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x32421
1999A
A+B Again?
implementation
,
math
800
x56154
1998E2
Eliminating Balls With Merging (Hard Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
2500
x693
1998E1
Eliminating Balls With Merging (Easy Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
2200
x1839
1998D
Determine Winning Islands in Race
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
2100
x3323
1998C
Perform Operations to Maximize Score
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x6129
1998B
Minimize Equal Sum Subarrays
constructive algorithms
,
math
,
number theory
1000
x23801
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x23947
1997F
Chips on a Line
brute force
,
combinatorics
,
dp
,
greedy
,
math
2700
x901
1997E
Level Up
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2200
x3134
1997D
Maximize the Root
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1500
x12527
1997C
Even Positions
constructive algorithms
,
data structures
,
greedy
1100
x22028
1997B
Make Three Regions
constructive algorithms
,
two pointers
1100
x20641
1997A
Strong Password
brute force
,
implementation
,
strings
800
x29242
1996G
Penacony
brute force
,
data structures
,
graphs
,
greedy
,
hashing
2200
x1771
1996F
Bomb
binary search
,
greedy
,
math
1900
x4789
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x9823
1996D
Fun
binary search
,
brute force
,
combinatorics
,
math
,
number theory
1500
x15994
1996C
Sort
dp
,
greedy
,
sortings
,
strings
1200
x22947
1996B
Scale
greedy
,
implementation
800
x32594
1996A
Legs
binary search
,
math
,
ternary search
800
x43298
1995E2
Let Me Teach You a Lesson (Hard Version)
data structures
,
dp
,
matrices
,
two pointers
2900
x303
1995E1
Let Me Teach You a Lesson (Easy Version)
2-sat
,
data structures
,
dp
,
matrices
,
two pointers
2700
x381
1995D
Cases
bitmasks
,
brute force
,
dp
,
strings
2300
x2364
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x8587
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1700
x8795
1995B1
Bouquet (Easy Version)
binary search
,
brute force
,
greedy
,
sortings
,
two pointers
1100
x18000
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x24244
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x706
1994G
Minecraft
bitmasks
,
brute force
,
dp
,
graphs
,
math
2600
x1275
1994F
Stardew Valley
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x1211
1994E
Wooden Game
bitmasks
,
greedy
,
math
,
trees
2000
x4519
1994D
Funny Game
constructive algorithms
,
dsu
,
graphs
,
greedy
,
math
,
number theory
,
trees
1900
x5774
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x10803
1994B
Fun Game
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x16562
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x20246
1993F2
Dyn-scripted Robot (Hard Version)
chinese remainder theorem
,
math
,
number theory
2800
x418
1993F1
Dyn-scripted Robot (Easy Version)
brute force
,
chinese remainder theorem
,
constructive algorithms
,
math
,
number theory
2400
x1001
1993E
Xor-Grid Problem
bitmasks
,
constructive algorithms
,
dp
,
implementation
2700
x544
1993D
Med-imize
binary search
,
dp
,
greedy
2200
x3757
1993C
Light Switches
implementation
,
math
1400
x13641
1993B
Parity and Sum
constructive algorithms
,
greedy
1100
x22764
1993A
Question Marks
greedy
,
implementation
800
x29426
1992G
Ultra-Meow
combinatorics
,
dp
,
math
2000
x3142
1992F
Valuable Cards
brute force
,
dp
,
greedy
,
number theory
,
two pointers
1900
x5768
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x9169
1992D
Test of Love
dp
,
greedy
,
implementation
1200
x20450
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x29148
1992B
Angry Monk
greedy
,
math
,
sortings
800
x34311
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x41383
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x130
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x505
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x612
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2327
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x4228
1991D
Prime XOR Coloring
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
math
,
number theory
1900
x6678
1991C
Absolute Zero
constructive algorithms
,
greedy
,
math
1300
x14616
1991B
AND Reconstruction
bitmasks
,
constructive algorithms
,
greedy
1100
x16396
1991A
Maximize the Last Element
greedy
,
implementation
800
x21867
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
2800
x296
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x870
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x929
1990D
Grid Puzzle
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
1800
x6326
1990C
Mad MAD Sum
brute force
,
greedy
,
math
1500
x11650
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