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October 12, 2015 15:24
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Codeforces #325 Div2
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| # #325 Div2 A. Alena's Schedule | |
| n = gets.chomp.to_i | |
| a = gets.chomp.split(" ").map(&:to_i) | |
| lesson = 0 | |
| rest = 0 | |
| a.each do |i| | |
| if i == 1 then | |
| if rest == 1 and lesson > 0 then | |
| lesson += 1 | |
| end | |
| rest = 0 | |
| lesson += 1 | |
| else | |
| rest += 1 | |
| end | |
| end | |
| puts lesson |
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