foo.cc: In function 'int fun1(int, int, int****)':
foo.cc:29:8: error: invalid conversion from 'int' to 'int***' [-fpermissive]
   29 | b[k++]=i;
      |        ^
      |        |
      |        int
foo.cc: In function 'int main()':
foo.cc:40:20: error: invalid type argument of unary '*' (have 'int')
   40 | k=fun1(a[i],a[i+1],*b[0]);
      |                    ^~~~~

[Hydro](https://hydro.ac)提供评测服务