View Compilation Error

0_0_29807325_27332.cpp: In function 'int main()':
0_0_29807325_27332.cpp:13:22: error: 'x' was not declared in this scope
  ll gcd=exgcd(dis[0],x,dis[1],y);
                      ^
0_0_29807325_27332.cpp:13:31: error: 'y' was not declared in this scope
  ll gcd=exgcd(dis[0],x,dis[1],y);
                               ^
0_0_29807325_27332.cpp:13:32: error: 'exgcd' was not declared in this scope
  ll gcd=exgcd(dis[0],x,dis[1],y);
                                ^