Here is the solution to URI problem ID: 1015
#include<stdio.h>
#include<math.h>
int main()
{
double x1,x2,y1,y2,distance;
scanf("%lf%lf",&x1,&y1);
scanf("%lf%lf",&x2,&y2);
distance=(sqrt(((x2-x1)*(x2-x1))+((y2-y1)*(y2-y1))));
printf("%.4lf\n",distance);
return 0;
}
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