Types: n: int, xi: int, yi: int, ri: int
Ranges: 3 ≤ n ≤ 100, 0 ≤ xi ≤ 1000, 0 ≤ yi ≤ 1000, 1 ≤ ri ≤ 25
Addtl Info: End of input indicated by a line containing a zero