private (int Ytop, int Hits) Solve()
{
var target = Target.Parse(_input);
var xvelmin = 0;
for (int i = 0; i < target.Xmin; i += xvelmin)
{
xvelmin++;
}
var ytop = 0;
var hits = 0;
for (int yvel = target.Ymin; yvel <= -target.Ymin; yvel++)
{
for (int xvel = xvelmin; xvel <= target.Xmax; xvel++)
{
var probe = new Probe(xvel, yvel);
while (probe.CanHit(target))
{
probe.Tick();
if (probe.IsHit(target))
{
ytop = Math.Max(ytop, probe.Ytop);
hits++;
break;
}
}
}
}
return(ytop, hits);
}