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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
31:11:02
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Difficulty:
—
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
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Status
Standings
Custom test
Problems
#
Name
1381E
Origami
geometry
,
math
,
sortings
3300
x98
1380G
Circular Dungeon
greedy
,
math
,
probabilities
2600
x760
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x4593
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x384
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12419
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x75
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1914
1375A
Sign Flipping
constructive algorithms
,
math
1100
x17979
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x21905
1374B
Multiply by 2, divide by 6
math
900
x44914
1374A
Required Remainder
math
800
x49975
1373C
Pluses and Minuses
math
1300
x17799
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x25552
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17269
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x25741
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2287
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x4940
1371C
A Cookie for You
greedy
,
implementation
,
math
1300
x20076
1371B
Magical Calendar
math
1200
x18968
1371A
Magical Sticks
math
800
x43868
1370C
Number Game
games
,
math
,
number theory
1400
x23336
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x22984
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48094
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8217
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x18947
1369A
FashionabLee
geometry
,
math
800
x35355
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x839
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11131
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x18866
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36296
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x22487
1367B
Even Array
greedy
,
math
800
x49571
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x9780
1366C
Palindromic Paths
greedy
,
math
1500
x13103
1366B
Shuffle
math
,
two pointers
1300
x19334
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x28711
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x897
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3807
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34055
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x16795
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x140
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x303
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3374
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7343
1360D
Buying Shovels
math
,
number theory
1300
x30281
1360A
Minimal Square
greedy
,
math
800
x47488
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x346
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x5684
1359C
Mixing Water
binary search
,
math
1700
x13175
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x28570
1358C
Celex Update
math
1600
x16921
1358A
Park Lighting
greedy
,
math
800
x37782
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x4681
1355D
Game With Array
constructive algorithms
,
math
1400
x17334
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10135
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x25307
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x5781
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15270
1354A
Alarm Clock
math
900
x23166
1353C
Board Moves
math
1000
x33909
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x38664
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x16033
1352C
K-th Not Divisible by n
binary search
,
math
1200
x48774
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x34778
1352A
Sum of Round Numbers
implementation
,
math
800
x70219
1351B
Square?
brute force
,
implementation
,
math
900
x16327
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20235
1350A
Orac and Factors
math
900
x25463
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x106
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x390
1349D
Slime and Biscuits
math
,
probabilities
3200
x766
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x7655
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15739
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x1968
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8437
1348A
Phoenix and Balance
greedy
,
math
800
x38127
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x129
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x217
1346A
Color Revolution
*special problem
,
math
1000
x1935
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25329
1345A
Puzzle Pieces
math
800
x23769
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x940
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1633
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15132
1343B
Balanced Array
constructive algorithms
,
math
800
x53077
1343A
Candies
brute force
,
math
900
x45860
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x2751
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13546
1342A
Road To Zero
greedy
,
math
1000
x37869
1341A
Nastya and Rice
math
900
x28135
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x30851
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x791
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x2940
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x7987
1338A
Powered Addition
greedy
,
math
1500
x22380
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x32826
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x35601
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x277
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x632
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x10914
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