#include <stdio.h>
#include <xmmintrin.h>

__m128 sqrtss(float m)
{
	__m128 mCache= {
		.m128_f32[0]=m
	};
	return _mm_sqrt_ss(mCache);
}


void main()
{
	float m = 25.0f;
	scanf_s("%f",&m);
	printf("%f",sqrtss(m).m128_f32[0]);
}