#include"iostream"
using namespace std;
int c1[250010],c2[250010];
int value[55];
int amount[55];
int main()
{
int nNum;
while(scanf("%d",&nNum)&&nNum>0)
{
memset(value,0,sizeof(value));
memset(amount,0,sizeof(amount));
int sum=0;
for(int i=1;i<=nNum;++i)
{
scanf("%d %d",&value[i],&amount[i]);
sum+=value[i]*amount[i];
}
memset(c1,0,sum*sizeof(c1[0]));
memset(c2,0,sum*sizeof(c2[0]));
for(int i=0;i<=value[1]*amount[1];i+=value[1])
c1[i]=1;
int len=value[1]*amount[1];
for(int i=2;i<=nNum;++i)
{
for(int j=0;j<=len;++j)
for(int k=0;k<=value[i]*amount[i];k+=value[i])
{
c2[k+j]+=c1[j];
}
len+=value[i]*amount[i];
for(int j=0;j<=len;++j)
{
c1[j]=c2[j];
c2[j]=0;
}
}
for(int i=sum/2;i>=0;--i)
if(c1[i]!=0)
{
printf("%d %d\n",sum-i,i);
break;
}
}
return 0;
}