#include <stdio.h>
#include <math.h>
int main()
{
int x,y,x1,y1,x2,y2,R,a,b;
scanf("%d%d%d%d",&x
,&y
,&x1
,&y1
); printf("\nX:%d\nY:%d\nX1:%d\nY1:%d",x
,y
,x1
,y1
);
a=((x1-x)*(x1-x)+(y1-y)*(y1-y));
printf("\nX2:%d\nY2:%d",x2
,y2
); b=((x2-x)*(x2-x)+(y2-y)*(y2-y));
}
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