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whatalnk/cfEdu1-a-TrickySum.rb

Created November 19, 2015 10:39
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Educational Codeforces Round 1
Raw
cfEdu1-a-TrickySum.rb
t = gets.chomp.to_i
t.times do
n = gets.chomp.to_i
power2 = []
snd = 1
i = 1
while snd <= n
power2 << snd
snd = 2**i
i += 1
end
puts n*(n+1)/2 - 2 * power2.inject(:+)
end
Raw
cfEdu1-b-QueryOnaString.rb
s = gets.chomp.split("")
m = gets.chomp.to_i
m.times do
l, r, k = gets.chomp.split(" ").map(&:to_i)
kk = k % (r - l + 1)
sr = []
kk.times do
sr.unshift(s.slice!(r-1))
r -= 1
end
s.insert(l-1, sr).flatten!
end
puts s.join("")
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Dashboard - Educational Codeforces Round 1 - Codeforces

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