In kstests_2d.h, there are four lines inside the 'for' loop, which read:

if (fa > ga) fa += 1.0/n1;
if (fb > gb) fb += 1.0/n1;
if (fc > gc) fc += 1.0/n1;
if (fd > gd) fd += 1.0/n1;

Can anyone let know what these four lines do or what they mean? I am totally confused by these.

Thanks a lot!!!