minx00min0y0minsxsysminxymaxx0xmax0yymaxsxsysmaxxy-x0x-sxsy-xygcdsxsygcd-smaxxysminxysminxygcdsx0sxgcd0sysymin200s1max2-2gcd2FULL./TRS/Zantema06/gcdMinMax.trs