i;x;k;main(j){for(;j=~scanf("%d",&x);puts(""))for(k=i=500;k;i+=.5-500.*k/j,j*=2)k=i<x,k-=i>x,printf("%d %c\n",i,61-k);}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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