#include <stdio.h>

int main()
{
  int N, x, y, dx, dy, I, maxd2, maxx, maxy;
  
  freopen("cave.txt", "r", stdin);
  scanf("%d", &N);
  for (I = 0; I < N; I++) {
    x = y = maxd2 = 0;
    while (1) {
      scanf("%d%d", &dx, &dy); if (dx == 0 && dy == 0) { break; }
      x += dx; y += dy;
      if (maxd2 < x * x + y * y) {
	maxd2 = x * x + y * y; maxx = x; maxy = y;
      }
      else if (maxd2 == x * x + y * y && maxx < x) {
	maxx = x; maxy = y;
      }
    }
    printf("%d %d\n", maxx, maxy);
  }
  return 0;
}