Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Please read
the new rule regarding the restriction on the use of AI tools
.
×
→ Pay attention
Before contest
Codeforces Round 974 (Div. 3)
12:05:15
Register now »
→ Filter Problems
Difficulty:
—
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
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1907
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x2229
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x3039
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x9163
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x21092
1375B
Neighbor Grid
constructive algorithms
,
greedy
1200
x17247
1375A
Sign Flipping
constructive algorithms
,
math
1100
x18338
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1293
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x924
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x14008
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x23657
1374C
Move Brackets
greedy
,
strings
1000
x46415
1374B
Multiply by 2, divide by 6
math
900
x49888
1374A
Required Remainder
math
800
x53508
1373G
Pawns
data structures
,
divide and conquer
,
greedy
2600
x789
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1662
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x2729
1373D
Maximum Sum on Even Positions
divide and conquer
,
dp
,
greedy
,
implementation
1600
x15581
1373C
Pluses and Minuses
math
1300
x18339
1373B
01 Game
games
900
x35543
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x26922
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x443
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1180
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5378
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17795
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x27863
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31889
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x614
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2340
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x5225
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x12976
1371C
A Cookie for You
greedy
,
implementation
,
math
1300
x20509
1371B
Magical Calendar
math
1200
x19140
1371A
Magical Sticks
math
800
x45890
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1471
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1590
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4873
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9608
1370C
Number Game
games
,
math
,
number theory
1400
x24500
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23650
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x51758
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x645
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2239
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8599
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19558
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x24374
1369A
FashionabLee
geometry
,
math
800
x36461
1368H2
Breadboard Capacity (hard version)
3500
x226
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x349
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x592
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x1039
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x2208
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11771
1368C
Even Picture
constructive algorithms
1500
x13316
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19682
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x39069
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1656
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3253
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5431
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x8320
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x23445
1367B
Even Array
greedy
,
math
800
x53289
1367A
Short Substrings
implementation
,
strings
800
x57188
1366G
Construct the String
data structures
,
dp
,
strings
2700
x544
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x802
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4265
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x10461
1366C
Palindromic Paths
greedy
,
math
1500
x13560
1366B
Shuffle
math
,
two pointers
1300
x20926
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x30004
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x1159
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4437
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7826
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x17191
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x23054
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x26795
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x24054
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1418
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4360
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x13142
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x19775
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x27962
1363F
Rotating Substrings
dp
,
strings
2600
x1492
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6801
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4075
1363C
Game On Leaves
games
,
trees
1600
x18642
1363B
Subsequence Hate
implementation
,
strings
1400
x23562
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x35731
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x18234
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x19060
1362A
Johnny and Ancient Computer
implementation
1000
x23959
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x154
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x688
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x317
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1624
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3621
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8414
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4562
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7731
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x12367
←
1
2
...
35
36
37
38
39
...
98
99
→
User lists
Name