huxibn
幼苗
共回答了29个问题 举报
123,124,125,132,134,135,142,143,145,152,153,154,213,214,215,231,234,235,241,243,245,251,253,254,312,314,315,321,324,325,341,342,345,351,352,354,412,413,415,421,423,425,431,432,435,451,452,453,512,513,514,521,523,524,531,532,534,541,542,543用列举法总共60项,满足的有24项
二十四分之六十
1年前
2