回答編集履歴
1
問題の解釈相違
answer
CHANGED
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@@ -16,4 +16,33 @@
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16
16
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04/06,09/27
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17
17
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04/22,09/11
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18
18
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06/01,08/08
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19
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+
```
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20
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+
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21
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追記：
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22
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問題を読み誤っていたかも。こういうことか？
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23
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```lang-Ruby
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24
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GANTAN = Time.mktime(2015,1,1)
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25
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days = (0...365).map { |i| GANTAN + i*24*3600 }
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26
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27
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days.repeated_combination(2) do |x,y|
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28
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z1 = days[(x.yday+y.yday)%365-1]
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29
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z2 = Rational(x.mon,x.day)+Rational(y.mon,y.day)
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30
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if z1.mon == z2.numerator and z1.day == z2.denominator
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31
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puts [x.strftime("%m/%d"),y.strftime("%m/%d")].join(",")
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32
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end
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33
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end
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34
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#=>
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35
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01/28,02/28
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36
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01/30,06/30
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37
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01/31,07/31
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38
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03/03,07/02
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39
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04/06,09/27
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40
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04/22,09/11
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41
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07/07,09/27
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42
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08/06,09/27
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43
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09/12,10/24
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44
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10/10,12/28
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45
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10/15,11/24
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46
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10/30,12/04
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47
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12/06,12/30
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19
48
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```
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