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