动态规划题，麻烦在要输出一个最优解
代码如下：
#include<stdio.h>
#include<stdlib.h>
#include<stack>
struct tmice{
int weight;
int speed;
int id;
}mice[1001];
int f[1001],r[1001],b[1001];
int compare( const void * a, const void *b)
{
tmice * a1=(tmice *)a;tmice * b1=(tmice *)b;
if(a1->weight!=b1->weight)
return a1->weight-b1->weight;
else
return b1->speed-a1->speed;
}
int main()
{
int i,count=0,j,max=-1000,maxid=0;
while(scanf("%d %d",&mice[count].weight,&mice[count].speed)!=EOF)
{
mice[count].id=count+1;
count++;
}
qsort(mice,count,sizeof(mice[0]),compare);
for(i=0;i<count;i++)
{
f[i]=1;r[i]=-1;
for(j=i-1;j>=0;j--)
{
if(mice[i].weight>mice[j].weight&&mice[i].speed<mice[j].speed&&f[j]+1>f[i])
{
f[i]=f[j]+1;r[i]=j;
}
}
if(f[i]>max)
{
max=f[i];maxid=i;
}
}
printf("%d\n",max);i=0;
while(maxid!=-1)
{
b[i]=maxid;maxid=r[maxid];i++;
}
i--;
while(i>=0)
{
maxid=b[i];i--;
printf("%d\n",mice[maxid].id);
}
return 0;
}