mình nghĩ là 6 vì
có 2 con đường từ a đến b có 3 con đường từ b đến c
vậy nên tớ nghĩ 2.3=6
đồng ý kết quả của trần dương yến nhi
có 6 con đường,mình chắc chắn luôn
là 6 đó mình làm rồi đúng chắc chắn 100% lun ko thì tớ mất cậu 1 ti
2*3=6 con đường
mk làm bài này trên violimpic rồi chắc 100%
6 dung 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%{nha cac ban}