/in/foo.cc: In function 'int main()':
/in/foo.cc:6:34: warning: unused variable 'i' [-Wunused-variable]
  long long a[100000],b[100000],n,i=1,c=0,n1,a1=1;
                                  ^
/in/foo.cc:6:38: warning: unused variable 'c' [-Wunused-variable]
  long long a[100000],b[100000],n,i=1,c=0,n1,a1=1;
                                      ^
/in/foo.cc:6:45: warning: unused variable 'a1' [-Wunused-variable]
  long long a[100000],b[100000],n,i=1,c=0,n1,a1=1;
                                             ^~