和Vijos 1006类似，本题的DP也是带有环形性质的，因此处理方法也是从左往右再从右往左扫一次。需要特别注意的是Vijos不支持Special Judge且本题的数据不能保证满足题目条件的最优路径只有一条，因此如果按照题目描述所说输入任意一条路径是不能AC的，输出最优路径中的最短路径即可AC。
状态转移方程是f[i,j]=min(f[i-1,j],f[i,j-1],f[i,j+1])+map[i,j](1<=i<=m,1<=j<=n);
R1070450 Accepted 100 From IwfWcf P1139 FPC Vijos Dragon 2008-11-18 16:41:28
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