Created
October 29, 2020 06:17
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# @param {Integer[]} nums | |
# @return {String[]} | |
def summary_ranges(nums) | |
return [] if nums.empty? | |
prev = nums.shift | |
r = [prev] | |
out = [] | |
nums.each do |n| | |
if prev + 1 != n | |
r << prev | |
out << r | |
r = [n] | |
end | |
prev = n | |
end | |
unless r.empty? | |
r << prev | |
out << r | |
end | |
out.map do |r| | |
b, e = r | |
if b == e | |
"#{b}" | |
else | |
"#{b}->#{e}" | |
end | |
end | |
end |
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