View Compilation Error

0_0_37438012_16058.cpp: In function 'int main()':
0_0_37438012_16058.cpp:69:25: error: invalid initialization of reference of type 'int&' from expression of type 'll {aka long long int}'
         exgcd(a, b, x, y);
                         ^
0_0_37438012_16058.cpp:19:6: note: in passing argument 3 of 'void exgcd(int, int, int&, int&)'
 void exgcd(int a, int b, int  &x, int &y)
      ^