/in/foo.cc: In function 'int main()':
/in/foo.cc:4:20: warning: variable 'g' set but not used [-Wunused-but-set-variable]
  int n,a,b,c,d,e,f,g,h,i,j,k,l;
                    ^
/in/foo.cc:4:22: warning: variable 'h' set but not used [-Wunused-but-set-variable]
  int n,a,b,c,d,e,f,g,h,i,j,k,l;
                      ^
/in/foo.cc:4:24: warning: variable 'i' set but not used [-Wunused-but-set-variable]
  int n,a,b,c,d,e,f,g,h,i,j,k,l;
                        ^
/in/foo.cc:13:2: warning: 'j' is used uninitialized in this function [-Wuninitialized]
  if(j>k)
  ^~
/in/foo.cc:13:2: warning: 'k' is used uninitialized in this function [-Wuninitialized]
/in/foo.cc:16:10: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<l;
          ^