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Problems
#
Name
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x26106
1997C
Even Positions
constructive algorithms
,
data structures
,
greedy
1100
x25392
1997B
Make Three Regions
constructive algorithms
,
two pointers
1100
x23441
1997A
Strong Password
brute force
,
implementation
,
strings
800
x33341
1996C
Sort
dp
,
greedy
,
sortings
,
strings
1200
x27943
1996B
Scale
greedy
,
implementation
800
x36862
1996A
Legs
binary search
,
math
,
ternary search
800
x57041
1995B1
Bouquet (Easy Version)
binary search
,
brute force
,
greedy
,
sortings
,
two pointers
1100
x20924
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x26386
1994B
Fun Game
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x19438
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x22266
1993B
Parity and Sum
constructive algorithms
,
greedy
1100
x26385
1993A
Question Marks
greedy
,
implementation
800
x33084
1992D
Test of Love
dp
,
greedy
,
implementation
1200
x23951
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x33206
1992B
Angry Monk
greedy
,
math
,
sortings
800
x37883
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x49087
1991B
AND Reconstruction
bitmasks
,
constructive algorithms
,
greedy
1100
x18877
1991A
Maximize the Last Element
greedy
,
implementation
800
x24354
1990B
Array Craft
constructive algorithms
,
greedy
1200
x19831
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x26821
1989B
Substring and Subsequence
brute force
,
greedy
,
strings
1200
x23278
1989A
Catch the Coin
implementation
800
x29312
1988B
Make Majority
greedy
,
implementation
900
x26415
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x26952
1987C
Basil's Garden
dp
,
greedy
1200
x20704
1987B
K-Sort
greedy
1000
x23867
1987A
Upload More RAM
greedy
,
math
800
x28936
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x25956
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x30094
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x47879
1985E
Secret Box
brute force
,
combinatorics
,
math
1200
x23483
1985D
Manhattan Circle
implementation
,
math
900
x41320
1985C
Good Prefixes
greedy
1000
x39931
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x56458
1985A
Creating Words
implementation
,
strings
800
x71886
1984B
Large Addition
implementation
,
math
1100
x20930
1984A
Strange Splitting
constructive algorithms
800
x22849
1983B
Corner Twist
constructive algorithms
,
greedy
,
implementation
,
math
1200
x18375
1983A
Array Divisibility
constructive algorithms
,
math
800
x28086
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x21858
1982B
Collatz Conjecture
brute force
,
implementation
,
math
,
number theory
1200
x19734
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x27481
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x24226
1980B
Choosing Cubes
sortings
,
sortings
800
x38420
1980A
Problem Generator
math
800
x47494
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x22153
1979B
XOR Sequences
bitmasks
,
greedy
1000
x26374
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x31734
1978B
New Bakery
binary search
,
greedy
,
math
,
ternary search
800
x25298
1978A
Alice and Books
constructive algorithms
,
greedy
,
sortings
800
x28592
1977B
Binary Colouring
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x19867
1977A
Little Nikita
math
800
x39044
1976B
Increase/Decrease/Copy
greedy
,
implementation
1100
x25043
1976A
Verify Password
implementation
,
sortings
,
strings
800
x32599
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x17134
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x21022
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x20678
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x34399
1974A
Phone Desktop
greedy
,
math
800
x37853
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x28483
1972B
Coin Games
games
900
x25345
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x25883
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x30488
1971C
Clock and Strings
implementation
900
x41394
1971B
Different String
implementation
,
strings
800
x44457
1971A
My First Sorting Problem
implementation
,
sortings
800
x59090
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x7194
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x22300
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x22019
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x29223
1968B
Prefiquence
greedy
,
two pointers
800
x31366
1968A
Maximize?
brute force
,
math
,
number theory
800
x39362
1966B
Rectangle Filling
constructive algorithms
,
implementation
1100
x17184
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x19551
1958A
1-3-5
*special problem
,
dp
1100
x2565
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1100
x20365
1957A
Stickogon
constructive algorithms
,
greedy
800
x25649
1956B
Nene and the Card Game
games
,
greedy
800
x22901
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x24154
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x32224
1955A
Yogurt Sale
math
800
x52587
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x22714
1954B
Make It Ugly
implementation
,
math
1200
x21480
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x27478
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x16822
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x22536
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x26449
1950C
Clock Conversion
implementation
,
math
800
x46787
1950B
Upscaling
implementation
800
x44113
1950A
Stair, Peak, or Neither?
implementation
800
x69138
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x26244
1948A
Special Characters
brute force
,
constructive algorithms
800
x30925
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x23385
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x28536
1945C
Left and Right Houses
brute force
1200
x17370
1945B
Fireworks
math
,
number theory
900
x26183
1945A
Setting up Camp
greedy
,
math
800
x30290
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x18141
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x28592
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dfs and similar
divide and conquer
dp
dsu
expression parsing
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graph matchings
graphs
greedy
hashing
implementation
interactive
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number theory
probabilities
schedules
shortest paths
sortings
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ternary search
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