#include <stdio.h>
#include <stdlib.h>
int main (void)
{
int x,y;
if((x>0)&&(y>0))
else if ((x<0)&&(y>0))
else if ((x<0)&&(y<0))
else if ((x>0)&&(y<0))
else if ((x==0)&&(y!=0))
else
return 0 ;
}
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