/in/foo.cc: In function 'int main()':
/in/foo.cc:5:12: warning: unused variable 'o' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
            ^
/in/foo.cc:5:14: warning: unused variable 'p' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
              ^
/in/foo.cc:5:16: warning: unused variable 'q' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                ^
/in/foo.cc:5:18: warning: unused variable 'w' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                  ^
/in/foo.cc:5:20: warning: unused variable 'v' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                    ^
/in/foo.cc:5:26: warning: unused variable 'x' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                          ^
/in/foo.cc:5:28: warning: unused variable 'm' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                            ^
/in/foo.cc:5:30: warning: unused variable 's' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                              ^
/in/foo.cc:5:32: warning: unused variable 't' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                                ^
/in/foo.cc:5:34: warning: unused variable 'r' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                                  ^
/in/foo.cc:5:36: warning: unused variable 'y' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                                    ^
/in/foo.cc:5:38: warning: unused variable 'u' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                                      ^
/in/foo.cc:5:40: warning: unused variable 'k' [-Wunused-variable]
  int n,l=1,o,p,q,w,v,z=0,x,m,s,t,r,y,u,k;
                                        ^