18/08/15 13:12:35.51 p/Nzh/yc.net
>>964
>>>962
>a～b ⇔ 0<a<2 b = a+1 or 0<a<1 b = a+2 or 0<b<2 a = b+1 or 0<b<1 a = b+2 or a=b
18/08/15 13:12:35.51 p/Nzh/yc.net
>>964
>>>962
>a～b ⇔ 0<a<2 b = a+1 or 0<a<1 b = a+2 or 0<b<2 a = b+1 or 0<b<1 a = b+2 or a=b