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237 problems · filtered by 2 tags
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Name
✎
Rating
↕
Solved
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2242E
Product of Closures
bitmasks
brute force
constructive algorithms
greedy
implementation
math
number theory
+
2200
1.4k
2231F
Quadratic Jumps
brute force
constructive algorithms
greedy
math
number theory
+
2600
787
2225G
Simple Problem
brute force
graphs
greedy
number theory
+
2900
269
2219A
Grid L
brute force
constructive algorithms
math
number theory
+
1400
10.7k
2215B
RReeppeettiittiioonn
binary search
brute force
implementation
math
number theory
+
2000
1.3k
2211E
Minimum Path Cover
brute force
dp
greedy
interactive
math
number theory
trees
+
2500
1k
2205G
Simons and Diophantus Equation
bitmasks
brute force
data structures
math
number theory
+
3000
231
2204F
Sum of Fractions
binary search
brute force
combinatorics
data structures
greedy
math
number theory
two pointers
+
2200
1.3k
2203D
Divisibility Game
brute force
games
greedy
number theory
+
1700
6.1k
2194C
Secret message
bitmasks
brute force
dp
math
number theory
+
1300
11.6k
2181H
Honey Cake
brute force
math
number theory
+
1200
7.3k
2180A
Carnival Wheel
brute force
number theory
+
800
26.4k
2173C
Kanade's Perfect Multiples
brute force
constructive algorithms
greedy
number theory
+
1400
13.2k
2167D
Yet Another Array Problem
brute force
implementation
math
number theory
+
1000
31.5k
2164B
Even Modulo Pair
brute force
math
number theory
+
1000
20.1k
2153E
Zero Trailing Factorial
brute force
math
number theory
+
2400
1k
2144A
Cut the Array
brute force
constructive algorithms
math
number theory
+
800
22.3k
2138E1
Determinant Construction (Easy Version)
brute force
constructive algorithms
math
matrices
number theory
+
3100
270
2138E2
Determinant Construction (Hard Version)
brute force
constructive algorithms
math
matrices
number theory
+
3100
197
2131H
Sea, You & copriMe
brute force
constructive algorithms
graphs
greedy
math
number theory
+
2600
909
2123G
Modular Sorting
brute force
data structures
greedy
math
number theory
sortings
+
2100
3.3k
2118D1
Red Light, Green Light (Easy version)
brute force
dfs and similar
dp
graphs
implementation
number theory
+
1700
8.6k
2118D2
Red Light, Green Light (Hard version)
binary search
brute force
data structures
dfs and similar
dp
graphs
implementation
math
number theory
+
2200
2.6k
2114F
Small Operations
binary search
brute force
dfs and similar
dp
math
number theory
sortings
+
2000
5.6k
2114G
Build an Array
brute force
constructive algorithms
dp
greedy
math
number theory
+
2200
2.1k
2110F
Faculty
brute force
greedy
math
number theory
+
2400
1.9k
2094H
La Vaca Saturno Saturnita
binary search
brute force
math
number theory
+
1900
3.9k
2092F
Andryusha and CCB
brute force
constructive algorithms
greedy
math
number theory
strings
+
2900
438
2091E
Interesting Ratio
brute force
math
number theory
two pointers
+
1300
20.2k
2091G
Gleb and Boating
brute force
constructive algorithms
data structures
dp
graphs
greedy
math
number theory
shortest paths
+
2300
1.6k
2072G
I've Been Flipping Numbers for 300 Years and Calculated the Sum
binary search
brute force
combinatorics
divide and conquer
math
number theory
+
2200
2.2k
2053G
Naive String Splits
binary search
brute force
greedy
hashing
math
number theory
strings
+
3400
228
2048A
Kevin and Combination Lock
brute force
greedy
implementation
math
number theory
+
800
23k
2044F
Easy Demon Problem
binary search
brute force
data structures
math
number theory
+
1900
6.4k
2043D
Problem about GCD
brute force
flows
math
number theory
+
1800
7.9k
2041F
Segmentation Folds
brute force
dfs and similar
number theory
+
2400
520
2040D
Non Prime Tree
brute force
constructive algorithms
dfs and similar
greedy
number theory
trees
two pointers
+
1900
5.9k
2039C1
Shohag Loves XOR (Easy Version)
bitmasks
brute force
math
number theory
+
1200
13.8k
2039C2
Shohag Loves XOR (Hard Version)
bitmasks
brute force
math
number theory
+
1800
5.1k
2038K
Grid Walk
brute force
dp
greedy
math
number theory
+
2100
1.8k
2034A
King Keykhosrow's Mystery
brute force
chinese remainder theorem
math
number theory
+
800
18.6k
2034H
Rayan vs. Rayaneh
brute force
dfs and similar
dp
number theory
+
3300
199
2033F
Kosuke's Sloth
brute force
math
number theory
+
1800
7.3k
2029E
Common Generator
brute force
constructive algorithms
math
number theory
+
2100
3.6k
2021B
Maximize Mex
brute force
greedy
math
number theory
+
1200
19.2k
2020A
Find Minimum Operations
bitmasks
brute force
greedy
math
number theory
+
800
26.2k
2013E
Prefix GCD
brute force
dp
greedy
math
number theory
+
2200
4.4k
2008H
Sakurako's Test
binary search
brute force
greedy
math
number theory
+
2100
3.7k
2005D
Alter the GCD
binary search
brute force
data structures
divide and conquer
implementation
number theory
+
2400
1.3k
2004E
Not a Nim Problem
brute force
games
math
number theory
+
2100
5.2k
2002F1
Court Blue (Easy Version)
brute force
dfs and similar
dp
math
number theory
+
2600
1k
2002F2
Court Blue (Hard Version)
brute force
dp
math
number theory
+
2800
597
1996D
Fun
binary search
brute force
combinatorics
math
number theory
+
1500
20k
1995C
Squaring
brute force
constructive algorithms
greedy
implementation
math
number theory
+
1800
10.4k
1993F1
Dyn-scripted Robot (Easy Version)
brute force
chinese remainder theorem
constructive algorithms
math
number theory
+
2400
1.2k
1992F
Valuable Cards
brute force
dp
greedy
number theory
two pointers
+
1900
7.7k
1986G1
Permutation Problem (Simple Version)
binary search
brute force
combinatorics
data structures
math
number theory
+
2200
2k
1986G2
Permutation Problem (Hard Version)
brute force
data structures
hashing
math
number theory
+
2500
1.5k
1985B
Maximum Multiple Sum
brute force
math
number theory
+
800
57.8k
1982B
Collatz Conjecture
brute force
implementation
math
number theory
+
1200
20k
1982D
Beauty of the mountains
brute force
data structures
implementation
math
number theory
+
1700
10.2k
1977C
Nikita and LCM
brute force
data structures
dp
greedy
math
number theory
sortings
+
1900
8.2k
1973F
Maximum GCD Sum Queries
bitmasks
brute force
dp
implementation
number theory
+
3100
345
1968A
Maximize?
brute force
math
number theory
+
800
39.9k
1967B1
Reverse Card (Easy Version)
brute force
math
number theory
+
1400
16.3k
1967B2
Reverse Card (Hard Version)
brute force
math
number theory
+
2200
5k
1957E
Carousel of Combinations
brute force
combinatorics
dp
math
number theory
+
2400
1.7k
1955G
GCD on a grid
brute force
dfs and similar
dp
implementation
math
number theory
+
1900
6.1k
1950D
Product of Binary Decimals
brute force
dp
implementation
number theory
+
1100
26.7k
1950E
Nearly Shortest Repeating Substring
brute force
implementation
number theory
strings
+
1500
17.7k
1945H
GCD is Greater
brute force
data structures
math
number theory
+
2600
971
1934E
Weird LCM Operations
brute force
constructive algorithms
number theory
+
3000
379
1933C
Turtle Fingers: Count the Values of k
brute force
implementation
math
number theory
+
1100
25.7k
1928C
Physical Education Lesson
brute force
math
number theory
+
1600
10.5k
1928E
Modular Sequence
brute force
constructive algorithms
dp
graphs
greedy
math
number theory
+
2300
2.3k
1925B
A Balanced Problemset?
brute force
greedy
math
number theory
+
1200
23.5k
1920C
Partitioning the Array
brute force
math
number theory
+
1600
20.9k
1909E
Multiple Lamps
bitmasks
brute force
constructive algorithms
math
number theory
+
2400
1.7k
1907E
Good Triples
brute force
combinatorics
number theory
+
1600
16.7k
1902C
Insert and Equalize
brute force
constructive algorithms
greedy
math
number theory
+
1300
17.5k
1900D
Small GCD
bitmasks
brute force
dp
math
number theory
+
2000
5.6k
1899B
250 Thousand Tons of TNT
brute force
implementation
number theory
+
1100
35.4k
1896H1
Cyclic Hamming (Easy Version)
brute force
divide and conquer
dp
fft
math
number theory
+
3400
181
1896H2
Cyclic Hamming (Hard Version)
brute force
dp
fft
math
number theory
+
3500
164
1882E1
Two Permutations (Easy Version)
brute force
constructive algorithms
greedy
number theory
+
2400
1.3k
1879F
Last Man Standing
brute force
data structures
number theory
+
2800
652
1878F
Vasilije Loves Number Theory
brute force
math
number theory
+
1900
5k
1858B
The Walkway
brute force
dp
greedy
math
number theory
+
1500
13.2k
1855B
Longest Divisors Interval
brute force
combinatorics
greedy
math
number theory
+
900
48.1k
1850F
We Were Both Children
brute force
implementation
math
number theory
+
1300
25.4k
1848E
Vika and Stone Skipping
brute force
implementation
math
number theory
+
2600
981
1822G1
Magic Triples (Easy Version)
brute force
data structures
math
number theory
+
1700
9.9k
1822G2
Magic Triples (Hard Version)
brute force
data structures
math
number theory
+
2200
3.1k
1804C
Pull Your Luck
brute force
greedy
math
number theory
+
1500
14k
1797E
Li Hua and Array
brute force
data structures
dsu
math
number theory
two pointers
+
2300
1.7k
1796F
Strange Triples
brute force
math
number theory
+
2900
257
1792E
Divisors and Table
brute force
dfs and similar
dp
number theory
+
2400
1.6k
1789A
Serval and Mocha's Array
brute force
math
number theory
+
800
36.2k
1789E
Serval and Music Game
brute force
dp
implementation
math
number theory
+
2500
1k
1783E
Game of the Year
brute force
data structures
math
number theory
+
2300
2.5k
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