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When submitting a solution in C++, please select either C++14 (GCC 6-32) or C++17 (GCC 7-32) as your compiler.
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Before contest
Codeforces Round 935 (Div. 3)
06:50:45
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math
combine-tags-by-or
*combine tags by OR
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
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matrices
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shortest paths
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ternary search
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Problems
#
Name
1948F
Rare Coins
combinatorics
,
math
,
probabilities
x596
1944A
Destroying Bridges
math
x16699
1943D1
Counting Is Fun (Easy Version)
combinatorics
,
dp
,
math
x701
1943B
Non-Palindromic Substring
data structures
,
hashing
,
implementation
,
math
,
strings
x2078
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x23035
1941A
Rudolf and the Ticket
brute force
,
math
800
x34831
1937A
Shuffle Party
implementation
,
math
800
x19523
1936E
Yet Yet Another Permutation Problem
divide and conquer
,
fft
,
math
3400
x54
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2004
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x5848
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x928
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x6389
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5446
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x14957
1934A
Too Min Too Max
greedy
,
math
800
x21375
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x745
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x8588
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16141
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x18919
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x27909
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x33218
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x742
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x5849
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x12236
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2236
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x12252
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x14632
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x24442
1930E
2..3...4.... Wonderful! Wonderful!
combinatorics
,
dp
,
math
2400
x884
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x12434
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1498
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1358
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x3815
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12396
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x22849
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x27602
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x186
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1388
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3450
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x6858
1928A
Rectangle Cutting
geometry
,
math
800
x20213
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1382
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x11632
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x24373
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x8712
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3027
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x17447
1924D
Balanced Subsequences
combinatorics
,
dp
,
math
2700
x701
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x982
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2137
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6713
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x4919
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16191
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x18336
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3251
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8480
1921C
Sending Messages
greedy
,
math
900
x26326
1921A
Square
greedy
,
math
800
x38519
1920E
Counting Binary Strings
combinatorics
,
dp
,
math
2100
x2192
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x4844
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11157
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x18603
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x25784
1919E
Counting Prefixes
combinatorics
,
constructive algorithms
,
dp
,
implementation
,
math
2600
x731
1919A
Wallet Exchange
games
,
math
800
x30961
1918G
Permutation of Given
constructive algorithms
,
math
2700
x388
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x11905
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x27940
1917E
Construct Matrix
constructive algorithms
,
math
2500
x1196
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1571
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x8973
1917A
Least Product
constructive algorithms
,
math
800
x23542
1916H2
Matrix Rank (Hard Version)
combinatorics
,
dp
,
math
,
matrices
,
string suffix structures
2700
x483
1916H1
Matrix Rank (Easy Version)
brute force
,
combinatorics
,
dp
,
math
,
matrices
2700
x564
1916D
Mathematical Problem
brute force
,
constructive algorithms
,
geometry
,
math
1700
x7650
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16172
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x22798
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24001
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x17285
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1577
1914C
Quests
greedy
,
math
1100
x19583
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x27780
1912I
Innovative Washing Machine
geometry
,
math
,
two pointers
3300
x48
1912F
Fugitive Frenzy
math
,
probabilities
3100
x91
1912E
Evaluate It and Back Again
constructive algorithms
,
implementation
,
math
2200
x696
1912D
Divisibility Test
math
1900
x1203
1912B
Blueprint for Seating
combinatorics
,
divide and conquer
,
math
2100
x833
1909I
Short Permutation Problem
combinatorics
,
dp
,
fft
,
math
1900
x65
1909F2
Small Permutation Problem (Hard Version)
combinatorics
,
dp
,
math
2500
x785
1909F1
Small Permutation Problem (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2200
x1563
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1191
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3697
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9493
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x12855
1909A
Distinct Buttons
implementation
,
math
800
x15341
1907C
Removal of Unattractive Pairs
constructive algorithms
,
greedy
,
math
,
strings
1200
x17709
1906M
Triangle Construction
greedy
,
math
1700
x2133
1906K
Deck-Building Game
divide and conquer
,
math
2500
x234
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x792
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3308
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