a13.l

%start ZERO ONE
%{
	#include <stdio.h>
	char *ans[] = {"Correct", "Incorrect"};
%}
%%
<ZERO>0\n return 1;
<ZERO>1\n return 0;
<ZERO>1 BEGIN ONE;
<ZERO>0 ;

<ONE>1\n return 1;
<ONE>0\n return 0;
<ONE>0 BEGIN ZERO;
<ONE>1 ;
0 BEGIN ZERO;
1 BEGIN ONE;
.|\n return 1;
%%
int main(int argc, char *argv[])
{
	int ret = yylex();
	printf("%s bin set\n", ans[ret]);
	return ret;
}