hdu 1709 The Balance

#include<cstdio>
using namespace std;
int s[110],c1[10010],c2[10010];
int main()
{
int n,sum,i,j,k;
while(scanf("%d",&n)!=EOF)
{
sum=0;
for(i=1;i<=n;i++)
{
scanf("%d",&s[i]);
sum+=s[i];
}
for(i=0;i<=sum;i++)
{
c1[i]=0;
c2[i]=0;
}
c1[0]=c1[s[1]]=1;
for(i=2;i<=n;i++)
{
for(j=0;j<=sum;j++)
for(k=0;k+j<=sum&&k<=s[i];k+=s[i])
{
if(j>=k)
c2[j-k]+=c1[j];
else
c2[k-j]+=c1[j];
c2[j+k]+=c1[j];
}
for(j=0;j<=sum;j++)
{
c1[j]=c2[j];
c2[j]=0;
}
}
int count=0;
for(i=1;i<=sum;i++)
if(c1[i])
count++;
printf("%d\n",sum-count);
if(count!=sum)
{
for(i=1;i<=sum;i++)
if(c1[i]==0)
{
printf("%d",i);
break;
}
i++;
for(;i<=sum;i++)
if(c1[i]==0)
printf(" %d",i);
printf("\n");
}
}
return 0;
}