19名战士要过河,只有一条船,每次只能做4名战士,至少要渡几次才能使全部战士过河?4p'`1_)p2t3E5j*Z,s1h-d;Q(c4p9~
算式:提示/B-v4h,J:@7m1J)N,w:w4p'`1_)p2t3E5j*Z,s1h-d;Q(c4p9~
答:至少要渡2b(b1t0a/^9i0s5m*r次才能使全部战士过河。4p'`1_)p2t3E5j*Z,s1h-d;Q(c4p9~