2009年1月26日星期一

Vijos 1485 传球游戏 解题报告

用f[i,j]表示第i秒传到第j个人的方案数，递推式是f[i,j]=f[i-1,j-1]+f[i-1,j+1](1<=i<=m,1<=j<=n)，注意处理一下边界即可，初始化f[0,1]=1。由于f[i]只与f[i-1]有关，所以可以用滚动数组将空间复杂度降一维。

R1123595 Accepted 100 From IwfWcf－ P1485 FPC Vijos Dolphin 2009-1-26 11:27:14

发帖者 IwfWcf 时间： 11:33:00
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