不要抓住你们老师的一个小小错误不放,
人谁无过,过而改之,善莫大焉.
以下是所有情况,0,1,2代表三种不同作物,下面是按照数字大小顺序排列的不重不少,很好检验.共48种.
{0,1,0,1,0},
{0,1,0,1,2},
{0,1,0,2,0},
{0,1,0,2,1},
{0,1,2,0,1},
{0,1,2,0,2},
{0,1,2,1,0},
{0,1,2,1,2},
{0,2,0,1,0},
{0,2,0,1,2},
{0,2,0,2,0},
{0,2,0,2,1},
{0,2,1,0,1},
{0,2,1,0,2},
{0,2,1,2,0},
{0,2,1,2,1},
{1,0,1,0,1},
{1,0,1,0,2},
{1,0,1,2,0},
{1,0,1,2,1},
{1,0,2,0,1},
{1,0,2,0,2},
{1,0,2,1,0},
{1,0,2,1,2},
{1,2,0,1,0},
{1,2,0,1,2},
{1,2,0,2,0},
{1,2,0,2,1},
{1,2,1,0,1},
{1,2,1,0,2},
{1,2,1,2,0},
{1,2,1,2,1},
{2,0,1,0,1},
{2,0,1,0,2},
{2,0,1,2,0},
{2,0,1,2,1},
{2,0,2,0,1},
{2,0,2,0,2},
{2,0,2,1,0},
{2,0,2,1,2},
{2,1,0,1,0},
{2,1,0,1,2},
{2,1,0,2,0},
{2,1,0,2,1},
{2,1,2,0,1},
{2,1,2,0,2},
{2,1,2,1,0},
{2,1,2,1,2}
