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Before contest
Codeforces Round 941 (Div. 1)
09:11:20
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Before contest
Codeforces Round 941 (Div. 2)
09:11:20
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→ Filter Problems
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number theory
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
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Problems
#
Name
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2292
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x4947
1370C
Number Game
games
,
math
,
number theory
1400
x23485
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23059
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48567
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5124
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x9862
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26738
1360D
Buying Shovels
math
,
number theory
1300
x30656
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x5721
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x806
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20521
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15854
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x130
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15170
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13585
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2589
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x3906
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17013
1331B
Limericks
*special problem
,
math
,
number theory
x6976
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3023
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x29335
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1800
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11507
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x38007
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x25239
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2109
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15770
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25280
1310F
Bad Cryptography
math
,
number theory
3400
x67
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2339
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x13538
1295D
Same GCDs
math
,
number theory
1800
x8403
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32167
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x771
1285F
Classical?
binary search
,
combinatorics
,
number theory
2900
x1061
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x21898
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1710
1277B
Make Them Odd
greedy
,
number theory
1200
x14600
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9346
1264F
Beautiful Fibonacci Problem
constructive algorithms
,
number theory
3500
x832
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13289
1260C
Infinite Fence
greedy
,
math
,
number theory
1700
x7863
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x573
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x2929
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4407
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x13877
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7410
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12261
1238A
Prime Subtraction
math
,
number theory
900
x23222
1228C
Primes and Multiplication
math
,
number theory
1700
x8676
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x521
1225D
Power Products
hashing
,
math
,
number theory
1800
x7368
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x226
1220D
Alex and Julian
bitmasks
,
math
,
number theory
1900
x3684
1220B
Multiplication Table
math
,
number theory
1300
x11330
1210C
Kamil and Making a Stream
math
,
number theory
,
trees
2000
x3201
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x7933
1208G
Polygons
greedy
,
math
,
number theory
2800
x720
1204E
Natasha, Sasha and the Prefix Sums
combinatorics
,
dp
,
math
,
number theory
2300
x1575
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x909
1200C
Round Corridor
math
,
number theory
1400
x9586
1198F
GCD Groups 2
greedy
,
number theory
,
probabilities
2900
x815
1195D2
Submarine in the Rybinsk Sea (hard edition)
combinatorics
,
math
,
number theory
1800
x4411
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7659
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x965
1190F
Tokitsukaze and Powers
number theory
,
probabilities
3400
x87
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4207
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x136
1184A2
Heidi Learns Hashing (Medium)
brute force
,
number theory
2100
x928
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5817
1182F
Maximum Sine
binary search
,
data structures
,
number theory
2700
x329
1182E
Product Oriented Recurrence
dp
,
math
,
matrices
,
number theory
2300
x2521
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7135
1176D
Recover it!
dfs and similar
,
graphs
,
greedy
,
number theory
,
sortings
1800
x5125
1174E
Ehab and the Expected GCD Problem
combinatorics
,
dp
,
math
,
number theory
2500
x1349
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x11786
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2700
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11183
1165D
Almost All Divisors
math
,
number theory
1600
x15090
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x9058
1154G
Minimum Possible LCM
brute force
,
greedy
,
math
,
number theory
2200
x2613
1152C
Neko does Maths
brute force
,
math
,
number theory
1800
x6517
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x14652
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x314
1146D
Frog Jumping
dfs and similar
,
math
,
number theory
2100
x1060
1144E
Median String
bitmasks
,
math
,
number theory
,
strings
1900
x4003
1143B
Nirvana
brute force
,
math
,
number theory
1200
x9932
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1974
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x1459
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x10891
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12319
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1808
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2771
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7245
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7659
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x8907
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x492
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22336
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3669
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