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Fire-Blaine #46
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Fire-Blaine #46
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GEM | ||
remote: https://rubygems.org/ | ||
specs: | ||
ansi (1.5.0) | ||
builder (3.2.4) | ||
coderay (1.1.3) | ||
method_source (1.0.0) | ||
minitest (5.14.2) | ||
minitest-reporters (1.4.2) | ||
ansi | ||
builder | ||
minitest (>= 5.0) | ||
ruby-progressbar | ||
minitest-skip (0.0.3) | ||
minitest (~> 5.0) | ||
minitest-spec (0.0.2.1) | ||
minitest (>= 3.0) | ||
pry (0.13.1) | ||
coderay (~> 1.1) | ||
method_source (~> 1.0) | ||
rake (13.0.1) | ||
ruby-progressbar (1.10.1) | ||
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PLATFORMS | ||
ruby | ||
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DEPENDENCIES | ||
minitest | ||
minitest-reporters | ||
minitest-skip | ||
minitest-spec | ||
pry | ||
rake | ||
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BUNDLED WITH | ||
2.1.4 |
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# Authoring recursive algorithms. Add comments including time and space complexity for each method. | ||||||||||
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# Time complexity: ? | ||||||||||
# Space complexity: ? | ||||||||||
# Time complexity: O(n) | ||||||||||
# Space complexity: 0(n) | ||||||||||
def factorial(n) | ||||||||||
raise NotImplementedError, "Method not implemented" | ||||||||||
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if n < 0 | ||||||||||
raise ArgumentError | ||||||||||
elsif n == 0 | ||||||||||
return 1 | ||||||||||
else | ||||||||||
return n * factorial(n-1) | ||||||||||
end | ||||||||||
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end | ||||||||||
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# Time complexity: ? | ||||||||||
# Space complexity: ? | ||||||||||
# Time complexity: ? O(n) | ||||||||||
# Space complexity: O(n)^2 | ||||||||||
def reverse(s) | ||||||||||
Comment on lines
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. 👍 However the time complexity is O(n^2) |
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raise NotImplementedError, "Method not implemented" | ||||||||||
# raise ArgumentError | ||||||||||
if s.length == 0 || s.length == 1 | ||||||||||
return s | ||||||||||
else | ||||||||||
return s[-1] + reverse(s[0...-1]) | ||||||||||
end | ||||||||||
end | ||||||||||
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# Time complexity: ? | ||||||||||
# Space complexity: ? | ||||||||||
# Time complexity: O(n) | ||||||||||
# Space complexity: O(n) | ||||||||||
def reverse_inplace(s) | ||||||||||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. 👍 |
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raise NotImplementedError, "Method not implemented" | ||||||||||
# raise NotImplementedError, "Method not implemented" | ||||||||||
return my_first_rapper(s, index = 0, last = -1) | ||||||||||
end | ||||||||||
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def my_first_rapper(s, index = 0, last = -1) | ||||||||||
if index >= s.length/2 || s.length <= 1 | ||||||||||
return s | ||||||||||
else | ||||||||||
s[index], s[last] = s[last], s[index] | ||||||||||
my_first_rapper(s, index + 1, last - 1) | ||||||||||
end | ||||||||||
end | ||||||||||
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# Time complexity: ? | ||||||||||
# Space complexity: ? | ||||||||||
def bunny(n) | ||||||||||
raise NotImplementedError, "Method not implemented" | ||||||||||
# raise NotImplementedError, "Method not implemented" | ||||||||||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Consider this:
Suggested change
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end | ||||||||||
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# Time complexity: ? | ||||||||||
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There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
👍