#include<stdio.h>
int main()
{
    int n,a,i,j,sum=0;
    while(scanf("%d",&n)!=EOF)
    {
        if(n==0)
        break;
    sum=0;
    for(i=1;i<=n;i++)
    {
        scanf("%d",&a);
        sum+=a;
    }
    printf("Sum is=%d\n",sum);
    }
    return 0;
}