#include<stdio.h>
#include<math.h>
int main()
{

   double x,y,r,a;
   scanf("%lf",&r);
   scanf("%lf%lf",&x,&y);
   if (fabs(x*x+y*y-r*r/2)<1e-6)
         printf("Yes");
    else
        printf("No");
return 0;
}

#include <stdio.h>
#include <math.h>
int main() { double x,y,e=1,c; scanf("%lf%lf",&x,&y); c=pow(x,2)+pow(y,2); c=sqrt(c); e=fabs(c-e); printf("%lf", e); return 0;
}


#include <stdio.h>
#define _USE_MATH_DEFINES
#include <math.h>
int main() { double x,y,z,d; scanf("%lf%lf",&x,&y); z=sqrt(y); d=2*sqrt(x/M_PI); if(d>z)printf("No"); else printf ("Yes"); return 0;
}