View Compilation Error

0_0_34346141_30754.cpp:6:27: error: expected identifier before '&' token
 long long dfs(long long x,&z,long long d)
                           ^
0_0_34346141_30754.cpp: In function 'long long int dfs(long long int, int&, long long int)':
0_0_34346141_30754.cpp:14:30: error: too few arguments to function 'long long int dfs(long long int, int&, long long int)'
    if(a[d][i]>x) ans+=dfs(x,i);
                              ^
0_0_34346141_30754.cpp:6:11: note: declared here
 long long dfs(long long x,&z,long long d)
           ^
0_0_34346141_30754.cpp: In function 'int main()':
0_0_34346141_30754.cpp:23:27: error: expected ')' before ';' token
  while(scanf("%d%d",&n,&m);)
                           ^
0_0_34346141_30754.cpp:23:28: error: expected primary-expression before ')' token
  while(scanf("%d%d",&n,&m);)
                            ^