/in/foo.cc: In function 'int main()':
/in/foo.cc:7:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j,k,s=0,t,n,x,y;
      ^
/in/foo.cc:7:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k,s=0,t,n,x,y;
        ^
/in/foo.cc:7:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k,s=0,t,n,x,y;
          ^
/in/foo.cc:7:12: warning: unused variable 's' [-Wunused-variable]
  int i,j,k,s=0,t,n,x,y;
            ^