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Before contest
Codeforces Round 945 (Div. 2)
11:08:51
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Difficulty:
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matrices
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
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shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
621E
Wet Shark and Blocks
dp
,
matrices
2000
x2730
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1374
691E
Xor-sequences
matrices
1900
x2373
222E
Decoding Genome
dp
,
matrices
1900
x2546
582B
Once Again...
constructive algorithms
,
dp
,
matrices
1900
x3306
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x3657
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x6011
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x8341
225C
Barcode
dp
,
matrices
1700
x8773
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4777
1513C
Add One
dp
,
matrices
1600
x13256
166E
Tetrahedron
dp
,
math
,
matrices
1500
x20014
485A
Factory
implementation
,
math
,
matrices
1400
x8101
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11800
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x19198
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