#include "stdio.h"
void main(){
	 int b=1,d=0,r=1;
	FILE *f;
	f = fopen("binarne-cifre.txt","r");
	while(!feof(f)){
		fscanf(f,"%d",&b);
		d+=b*r;
		r*=2;
	}
	printf("%d",d);
	fclose(f);
}