View Compilation Error

0_0_37497196_3987.cpp: In function 'int main()':
0_0_37497196_3987.cpp:31:15: error: invalid conversion from 'char*' to 'int' [-fpermissive]
   insert(a,len);
               ^
0_0_37497196_3987.cpp:31:15: error: too many arguments to function 'void insert(int)'
0_0_37497196_3987.cpp:5:6: note: declared here
 void insert(int len)
      ^
0_0_37497196_3987.cpp:36:28: error: invalid conversion from 'char*' to 'int' [-fpermissive]
   printf("%d\n",finds(a,len));
                            ^
0_0_37497196_3987.cpp:36:28: error: too many arguments to function 'int finds(int)'
0_0_37497196_3987.cpp:16:5: note: declared here
 int finds(int len)
     ^