>>20 暇だ
#include <stdio.h>
#define a printf
#define b scanf
#define c double
#define d int
#define e main
#define f void
#define g "%lf"
#define h ", "
#define i "\n"
#define j return
#define k if
#define l sizeof
#define m(a) l(a)/l(*a)
#define n for
#define o 10
#define p(i,a) n(i=0;i<m(a);i++)
d e(f){c A[o],B[o],C=0;d D;p(D,A)k(b(g,&A[D])!=1)j(-1);p(D,A)C+=A[D];C/=m(A);p(D,B)B[D]=A[D]-C;p(D,A)a(g h g i,A[D],B[D]);j(0);}