Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 937 (Div. 4)
02:37:54
Register now »
→ Filter Problems
Difficulty:
—
greedy
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
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1949H
Division Avoidance
greedy
,
math
x38
1949G
Scooter
graphs
,
greedy
x402
1949F
Dating
greedy
,
sortings
,
trees
x489
1949C
Annual Ants' Gathering
dfs and similar
,
greedy
,
trees
x792
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1201
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2162
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x17810
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3020
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x7084
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x14737
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x19702
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x5662
1945D
Seraphim the Owl
dp
,
greedy
1300
x10068
1945A
Setting up Camp
greedy
,
math
800
x20781
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x18606
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x146
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x256
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1458
1943A
MEX Game 1
games
,
greedy
1300
x13225
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4621
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x27567
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x24340
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12143
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x355
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x942
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6106
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x311
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1011
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6502
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1081
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x2820
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5638
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x15526
1934A
Too Min Too Max
greedy
,
math
800
x22103
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16703
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x33960
1932D
Card Game
greedy
,
implementation
1400
x9112
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x25356
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x12553
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x24916
1931B
Make Equal
greedy
800
x29071
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2253
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3496
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6086
1930A
Maximise The Score
greedy
,
sortings
800
x16346
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1397
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12637
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23093
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x27938
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1432
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3534
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14527
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1409
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3527
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17416
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x24695
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x29314
1927A
Make it White
greedy
,
strings
800
x38493
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2668
1926D
Vlad and Division
bitmasks
,
greedy
1300
x12717
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x17660
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x26615
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x11813
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x292
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5438
1923C
Find B
constructive algorithms
,
greedy
1400
x12165
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x15351
1923A
Moving Chips
greedy
,
implementation
800
x22391
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6794
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16346
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8585
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19440
1921C
Sending Messages
greedy
,
math
900
x26552
1921B
Arranging Cats
greedy
,
implementation
800
x31355
1921A
Square
greedy
,
math
800
x38854
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x18777
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x25960
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x708
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x1956
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3503
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x16260
1919B
Plus-Minus Split
greedy
800
x28417
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x710
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x12052
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21505
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28127
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9076
1916F
Group Division
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2900
x383
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2036
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16309
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5169
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x17624
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x26722
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3511
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x10849
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x10777
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x17162
1914C
Quests
greedy
,
math
1100
x19854
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13112
1910G
Pool Records
*special problem
,
greedy
2700
x48
←
1
2
3
...
26
27
→
User lists
Name