#include <stdio.h>
int main(void) {
int a, b, c, d;
int dx, dy;
scanf("%d%d%d%d",&a
, &b
, &c
, &d
); dx = a-c;
dy = b-d;
if ((dx*dy)<0)
{
}
else if ((dx*dy)>0)
{
}
if (dx == 0 || dy == 0){
}
return 0;
}
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