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Before contest
Codeforces Round 987 (Div. 2)
05:26:18
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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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Custom test
Problems
#
Name
1374A
Required Remainder
math
800
x54408
1373B
01 Game
games
900
x36516
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x27199
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x32024
1371B
Magical Calendar
math
1200
x19202
1371A
Magical Sticks
math
800
x46426
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23794
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x52833
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x24526
1369A
FashionabLee
geometry
,
math
800
x36744
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x39867
1367B
Even Array
greedy
,
math
800
x54200
1367A
Short Substrings
implementation
,
strings
800
x58006
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x30313
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x24166
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x28376
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x36253
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x19301
1362A
Johnny and Ancient Computer
implementation
1000
x24451
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x33046
1360B
Honest Coach
greedy
,
sortings
800
x48294
1360A
Minimal Square
greedy
,
math
800
x51116
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27911
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x29783
1358B
Maria Breaks the Self-isolation
greedy
,
sortings
1000
x24980
1358A
Park Lighting
greedy
,
math
800
x39681
1355B
Young Explorers
dp
,
greedy
,
sortings
1200
x25853
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x26753
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x31227
1354A
Alarm Clock
math
900
x23860
1353C
Board Moves
math
1000
x35672
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x50344
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x41165
1352C
K-th Not Divisible by n
binary search
,
math
1200
x55638
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x38039
1352A
Sum of Round Numbers
implementation
,
math
800
x81042
1351B
Square?
brute force
,
implementation
,
math
900
x17113
1351A
A+B (Trial Problem)
implementation
800
x24212
1350A
Orac and Factors
math
900
x26138
1348A
Phoenix and Balance
greedy
,
math
800
x39760
1346A
Color Revolution
*special problem
,
math
1000
x2043
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x26563
1345A
Puzzle Pieces
math
800
x24240
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x38690
1343B
Balanced Array
constructive algorithms
,
math
800
x57061
1343A
Candies
brute force
,
math
900
x48325
1342B
Binary Period
constructive algorithms
,
strings
1100
x23744
1342A
Road To Zero
greedy
,
math
1000
x40884
1341A
Nastya and Rice
math
900
x29113
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x26555
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x32199
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x34409
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x38598
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34922
1335B
Construct the String
constructive algorithms
900
x38707
1335A
Candies and Two Sisters
math
800
x85976
1334B
Middle Class
greedy
,
sortings
1100
x25952
1334A
Level Statistics
implementation
,
math
1200
x23351
1333B
Kind Anton
greedy
,
implementation
1100
x21649
1333A
Little Artem
constructive algorithms
1000
x24658
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19438
1330A
Dreamoon and Ranking Collection
implementation
900
x18804
1328C
Ternary XOR
greedy
,
implementation
1200
x30645
1328A
Divisibility Problem
math
800
x104292
1327B
Princesses and Princes
brute force
,
graphs
,
greedy
1200
x18748
1327A
Sum of Odd Integers
math
1100
x39350
1326B
Maximums
implementation
,
math
900
x24121
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x30507
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x36184
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x40483
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x28110
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x28617
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x26041
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19869
1321A
Contest for Robots
greedy
900
x14345
1316A
Grade Allocation
implementation
800
x18729
1315C
Restoring Permutation
greedy
1200
x10110
1315A
Dead Pixel
implementation
800
x12169
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15555
1312B
Bogosort
constructive algorithms
,
sortings
1000
x27260
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x26023
1311B
WeirdSort
dfs and similar
,
sortings
1200
x18973
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x42296
1307A
Cow and Haybales
greedy
,
implementation
800
x14993
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11796
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x14138
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17943
1304A
Two Rabbits
math
800
x25592
1303A
Erasing Zeroes
implementation
,
strings
800
x32549
1301A
Three Strings
implementation
,
strings
800
x19429
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x23678
1300A
Non-zero
implementation
,
math
800
x21068
1296B
Food Buying
math
900
x30413
1296A
Array with Odd Sum
math
800
x42328
1295A
Display The Number
greedy
900
x22930
1294B
Collecting Packages
implementation
,
sortings
1200
x21898
1294A
Collecting Coins
math
800
x47284
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x21299
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15477
1291A
Even But Not Even
greedy
,
math
,
strings
900
x19626
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