View Compilation Error

0_0_38572838_21724.cpp: In function 'int main()':
0_0_38572838_21724.cpp:56:15: error: cannot convert 'll*' {aka 'long long int*'} to 'int*'
     pos=erfen(a,x,k-a[j]);
               ^
0_0_38572838_21724.cpp:7:15: note:   initializing argument 1 of 'll erfen(int*, int, int)'
 ll erfen(int *a,int len,int c)
          ~~~~~^
0_0_38572838_21724.cpp:68:14: error: cannot convert 'll*' {aka 'long long int*'} to 'int*'
    pos=erfen(m,w,k-m[i]);
              ^
0_0_38572838_21724.cpp:7:15: note:   initializing argument 1 of 'll erfen(int*, int, int)'
 ll erfen(int *a,int len,int c)
          ~~~~~^