minusxx0minussxsyminusxyminus0x0minusx0xdivsxsysdivminusxysydiv0sy0fx0bxfxsybdivfxminussys0bbminussxsyminusxydivsxsyminusxydivsxsydivminusxysyfxsybminussys0fxsybfxminussys0bfxsybdivfxminussys0bbtruefxsybfxminussys0btruefxsybdivfxminussys0bbfalsedivsxsydivminusxysytrue1div211920f31182530div211020s1112000minus211020divsxsyminusxyfalsefxsybminussys0falseminussxsyminusxytrue1minus241025f32102130div211020s1212000minus211020