Created
December 28, 2015 00:41
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yukicoder No.026
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# [No.26 シャッフルゲーム - yukicoder](http://yukicoder.me/problems/74) | |
n = gets.chomp.to_i | |
m = gets.chomp.to_i | |
cups = Array.new(4, false) | |
cups[n] = true | |
m.times do | |
p_, q_ = gets.chomp.split(" ").map(&:to_i) | |
cups[p_], cups[q_] = cups[q_], cups[p_] | |
end | |
puts cups.index(true) | |
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