View Compilation Error

0_0_30737970_20464.cpp: In function 'void pre()':
0_0_30737970_20464.cpp:25:35: error: invalid initialization of reference of type 'll& {aka long long int&}' from expression of type 'int'
                 f_mod(g[i*prime[j]]);
                                   ^
0_0_30737970_20464.cpp:11:6: note: in passing argument 1 of 'void f_mod(ll&)'
 void f_mod(ll &x){
      ^
0_0_30737970_20464.cpp:27:68: error: invalid initialization of reference of type 'll& {aka long long int&}' from expression of type 'int'
             }else g[i*prime[j]]=g[i]*g[prime[j]],f_mod(g[i*prime[j]]);
                                                                    ^
0_0_30737970_20464.cpp:11:6: note: in passing argument 1 of 'void f_mod(ll&)'
 void f_mod(ll &x){
      ^