/in/foo.cc: In function 'int main()':
/in/foo.cc:13:27: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   13 |                         if(x%j==0)
      |                           ^
/in/foo.cc:5:15: warning: unused variable 'n1' [-Wunused-variable]
    5 |         int n,n1,a1=1,b1=1,x,m;
      |               ^~
/in/foo.cc:5:18: warning: unused variable 'a1' [-Wunused-variable]
    5 |         int n,n1,a1=1,b1=1,x,m;
      |                  ^~
/in/foo.cc:5:23: warning: unused variable 'b1' [-Wunused-variable]
    5 |         int n,n1,a1=1,b1=1,x,m;
      |                       ^~
/in/foo.cc:6:41: warning: unused variable 'c' [-Wunused-variable]
    6 |         long long a[2000000],b[2000000],c[2000000],d[2000000];
      |                                         ^
/in/foo.cc:6:52: warning: unused variable 'd' [-Wunused-variable]
    6 |         long long a[2000000],b[2000000],c[2000000],d[2000000];
      |                                                    ^
/in/foo.cc:25:15: warning: 'm' may be used uninitialized [-Wmaybe-uninitialized]
   25 |         cout<<m;
      |               ^
/in/foo.cc:5:30: note: 'm' was declared here
    5 |         int n,n1,a1=1,b1=1,x,m;
      |                              ^