minusxycondequalminxyyxycondtruexysminusxsymin0v0minu00minsusvsminuvequal00trueequalsx0falseequal0syfalseequalsxsyequalxyminusxyminxyminusxyequalminxyyminusxycondequalminxyyxycondtruexyminusxsyminsusvminuvequalsxsyequalxytruecondtruexyminusxsyminusxycondequalminxyyxytrueminusxyequalminxyyfalseequalsxsyequalxytrueequal22minusxyminxyfalseminsusvminuvtruemin22