C++ uva type question solution (include test data)

Chemical factories are dangerous because of many inflammable materials. Factory buildings may blow up when a fire accident occurs. Accordingly, the distance between buildings should be large enough, in case of a chain reaction destroys a large area. Given a set of chemical building positions (xi,yi), and the influence area (distance) ri of each building when it blows up. Your goal is to determine whether the worker, whose location is at (ui, vi), is safe when building j blows up. The first line is m that indicates the number of chemical buildings. The next m lines, which contain xi, yi, ri, represent the building positions and the influence areas when fire accidents occur. Then, a line indicates that j (j >= 0) building is blowing up, and a line shows the number of workers n that are close to chemical buildings. Finally, n lines, which contain ui, vi, represent the worker positions. The end of input is -1. Otherwise, the input repeats in the format aforementioned. Output Output should indicate whether the worker is safe Y or not N.