/in/foo.cc:9:1: error: expected initializer before 'int'
 int i,j,k,n,m,fa[155],aans;
 ^~~
/in/foo.cc: In function 'double dis(int, int)':
/in/foo.cc:40:16: error: 'y' was not declared in this scope
              +(y[xx]-y[yy])*(y[xx]-y[yy]));
                ^
/in/foo.cc: In function 'int findd(int)':
/in/foo.cc:51:5: error: 'fa' was not declared in this scope
  if(fa[xx]==xx) return fa[xx];
     ^~
/in/foo.cc:52:9: error: 'fa' was not declared in this scope
  return fa[xx]=findd(fa[xx]);
         ^~
/in/foo.cc: In function 'void unionn(int, int)':
/in/foo.cc:58:2: error: 'fa' was not declared in this scope
  fa[fx]=fy;
  ^~
/in/foo.cc: In function 'void kruskal()':
/in/foo.cc:64:6: error: 'i' was not declared in this scope
  for(i=1;i<=temp;i++)
      ^
/in/foo.cc:67:25: error: 'aans' was not declared in this scope
   unionn(a[i].u,a[i].v),aans+=a[i].w,t++;
                         ^~~~
/in/foo.cc:68:9: error: 'n' was not declared in this scope
   if(t==n-1)
         ^
/in/foo.cc:69:10: error: 'aans' was not declared in this scope
   {cout<<aans;
          ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:76:2: error: 'n' was not declared in this scope
  n=rr();
  ^
/in/foo.cc:77:6: error: 'i' was not declared in this scope
  for(i=1;i<=n;i++)
      ^
/in/foo.cc:78:2: error: 'fa' was not declared in this scope
  fa[i]=i,x[i]=r(),y[i]=r();
  ^~
/in/foo.cc:78:17: error: 'r' was not declared in this scope
  fa[i]=i,x[i]=r(),y[i]=r();
                 ^
/in/foo.cc:78:19: error: 'y' was not declared in this scope
  fa[i]=i,x[i]=r(),y[i]=r();
                   ^
/in/foo.cc:80:6: error: 'i' was not declared in this scope
  for(i=1;i<=n;i++)
      ^
/in/foo.cc:81:6: error: 'j' was not declared in this scope
  for(j=1;j<=n;j++)
      ^
/in/foo.cc:85:22: error: 'solve' was not declared in this scope
   a[temp].w=solve(i,j);
                      ^