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#
Name
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
x3007
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
x15776
1977D
XORificator
bitmasks
,
brute force
,
greedy
,
hashing
2300
x1165
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x4788
1975F
Set
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
math
2600
x529
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x4324
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x10894
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x13520
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x15401
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x2678
1973F
Maximum GCD Sum Queries
bitmasks
,
brute force
,
dp
,
implementation
,
number theory
3100
x142
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1547
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x20165
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x19735
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x7705
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x384
1970D1
Arithmancy (Easy)
brute force
,
constructive algorithms
,
interactive
,
strings
2100
x445
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x363
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1508
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x12576
1968A
Maximize?
brute force
,
math
,
number theory
800
x29172
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x40
1967C
Fenwick Tree
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
math
,
trees
2300
x1397
1967B2
Reverse Card (Hard Version)
brute force
,
math
,
number theory
2200
x3322
1967B1
Reverse Card (Easy Version)
brute force
,
math
,
number theory
1400
x10854
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
2400
x1056
1957D
A BIT of an Inequality
bitmasks
,
brute force
,
dp
,
math
1900
x3859
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x713
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1283
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3387
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x19680
1955H
The Most Reckless Defense
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graph matchings
,
shortest paths
2300
x1080
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3726
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7519
1952J
Help, what does it mean to be "Based"
brute force
,
constructive algorithms
,
expression parsing
,
implementation
,
sortings
x707
1952F
Grid
brute force
x1669
1952C
They Have Fooled
brute force
,
schedules
x2757
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x3128
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7906
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x12483
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x20914
1949E
Damage per Second
brute force
,
math
2900
x89
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x2139
1949A
Grove
brute force
,
dfs and similar
,
dp
,
geometry
,
probabilities
3300
x90
1948G
MST with Matching
bitmasks
,
brute force
,
dsu
,
graph matchings
,
trees
3100
x632
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2683
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8406
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14906
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20935
1948A
Special Characters
brute force
,
constructive algorithms
800
x26771
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x4183
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x511
1945C
Left and Right Houses
brute force
1200
x13335
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x382
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1289
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x585
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x27044
1941A
Rudolf and the Ticket
brute force
,
math
800
x39592
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1197
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7314
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x188
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x17062
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x895
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20931
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x14093
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x26630
1931A
Recovering a Small String
brute force
,
strings
800
x34028
1930F
Maximize the Difference
bitmasks
,
brute force
,
dfs and similar
2700
x621
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3758
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x13911
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1662
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1543
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13537
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1580
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3833
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7684
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18740
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25992
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1531
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18537
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x338
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5290
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1143
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3508
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x9052
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x896
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5176
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x12058
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26693
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9543
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19793
1916H1
Matrix Rank (Easy Version)
brute force
,
combinatorics
,
dp
,
math
,
matrices
2700
x585
1916D
Mathematical Problem
brute force
,
constructive algorithms
,
geometry
,
math
1700
x7978
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x39118
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1700
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11307
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x18692
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13931
1909F1
Small Permutation Problem (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2200
x1657
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1266
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