minusxycondequalminxyyxycondtruexysminusxsymin0v0minu00minsusvsminuvequal00trueequalsx0falseequal0syfalseequalsxsyequalxyminusxyminxyminusxyequalminxyyminusxycondequalminxyyxycondtruexyminusxsyminsusvminuvequalsxsyequalxytruecondtruexyminusxsyminusxycondequalminxyyxytrueminusxyequalminxyyfalseequalsxsyequalxytrue1equal281120s1411minusxyminxyfalseminsusvminuvtrue1min2810210s1414