View Compilation Error

0_0_30113037_17304.cpp: In function 'int main()':
0_0_30113037_17304.cpp:30:45: error: 'y' was not declared in this scope
     if((long long)x2 * xx + y2 * yy || x1 * y != y1 * x || (long long) x1 * xx + y1 * yy){
                                             ^
0_0_30113037_17304.cpp:30:55: error: 'x' was not declared in this scope
     if((long long)x2 * xx + y2 * yy || x1 * y != y1 * x || (long long) x1 * xx + y1 * yy){
                                                       ^