其实就是求两个序列的最长公共子序列

代码如下：

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;

int main()
{
    int n1,n2,Case=0;
    while(scanf("%d%d",&n1,&n2)&&n1)
    {
         int a[110],b[110];
         int dp[110][110],i,j;
         memset(dp,0,sizeof(dp));
         for(i=1;i<=n1;i++)
             scanf("%d",&a[i]);
         for(j=1;j<=n2;j++)
             scanf("%d",&b[j]);
         for(i=1;i<=n1;i++)
            for(j=1;j<=n2;j++)
            {
                if(a[i]==b[j])
                    dp[i][j]=dp[i-1][j-1]+1;
                else
                    dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
            }
         printf("Twin Towers #%d\n",++Case);
         printf("Number of Tiles : %d\n\n",dp[n1][n2]);
    }
 return 0;
}

uva--10066The Twin Towers +dp