View Compilation Error

0_0_25945820_26762.cpp: In function 'int main()':
0_0_25945820_26762.cpp:187:38: error: 'x' was not declared in this scope
                 if(find(a)!=find(b)||x==y){
                                      ^
0_0_25945820_26762.cpp:187:41: error: 'y' was not declared in this scope
                 if(find(a)!=find(b)||x==y){
                                         ^