杭电1092

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