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Codeforces Round 941 (Div. 1)
2 days
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Before contest
Codeforces Round 941 (Div. 2)
2 days
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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
math
matrices
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number theory
probabilities
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shortest paths
sortings
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strings
ternary search
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Problems
#
Name
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15848
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x1975
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8472
1348A
Phoenix and Balance
greedy
,
math
800
x38294
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x130
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x218
1346A
Color Revolution
*special problem
,
math
1000
x1939
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25448
1345A
Puzzle Pieces
math
800
x23795
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x943
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1639
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15169
1343B
Balanced Array
constructive algorithms
,
math
800
x53481
1343A
Candies
brute force
,
math
900
x46160
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x2802
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13580
1342A
Road To Zero
greedy
,
math
1000
x38213
1341A
Nastya and Rice
math
900
x28226
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x30998
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x797
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x2958
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8033
1338A
Powered Addition
greedy
,
math
1500
x22552
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x32991
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x35906
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x283
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x647
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x10966
1335A
Candies and Two Sisters
math
800
x78298
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2587
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16030
1334A
Level Statistics
implementation
,
math
1200
x22606
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x3906
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3551
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x7807
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17009
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19082
1331B
Limericks
*special problem
,
math
,
number theory
x6975
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x13709
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6348
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x8769
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x12484
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28028
1328A
Divisibility Problem
math
800
x92796
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8486
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3021
1327A
Sum of Odd Integers
math
1100
x36754
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x456
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15206
1326B
Maximums
implementation
,
math
900
x23449
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2075
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3888
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15385
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x6996
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6438
1312D
Count the Arrays
combinatorics
,
math
1700
x8895
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15747
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25259
1311D
Three Integers
brute force
,
math
2000
x8622
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40593
1310F
Bad Cryptography
math
,
number theory
3400
x67
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1074
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x11528
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x12919
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2323
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x2892
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x13514
1304A
Two Rabbits
math
800
x24988
1303B
National Project
math
1400
x15365
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9037
1300A
Non-zero
implementation
,
math
800
x20658
1299E
So Mean
interactive
,
math
3400
x148
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x414
1299A
Anu Has a Function
brute force
,
greedy
,
math
1500
x11746
1297G
M-numbers
*special problem
,
dp
,
math
x65
1296B
Food Buying
math
900
x29310
1296A
Array with Odd Sum
math
800
x39327
1295D
Same GCDs
math
,
number theory
1800
x8398
1295B
Infinite Prefixes
math
,
strings
1700
x9065
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4680
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11292
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32134
1294A
Collecting Coins
math
800
x44123
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x20763
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x327
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x771
1291A
Even But Not Even
greedy
,
math
,
strings
900
x18997
1288B
Yet Another Meme Problem
math
1100
x16718
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x17858
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x232
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x555
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x606
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1253
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x21881
1285A
Mezo Playing Zoma
math
800
x27248
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x306
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1094
1284C
New Year and Permutation
combinatorics
,
math
1600
x7687
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x12773
1283B
Candies Division
math
900
x21203
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