x[3];n;main(){for(;0<2*n?printf("%0*x",n-2?8:4,x[--n],*x-=x[1]>>27^-7?0:*x%2?:-1):~scanf(n%3?n=1,"%f":n%2?n=3,"%Lf":n?n=2,"%lf":"%s",n?x:&n);)n||puts("");}