#include<stdio.h>
#include<math.h>


float max(float q, float w)
{
 if (q > w) return q;
 else return w;

}

int fact(int f)
{
    if (f==1) return 1;
    else return(f*fact(f-1));
}

int doublefact(int f)
{
    if (f<=1) return 1;
    else return(f*doublefact(f-2));
}

float min(float q, float w)
{
 if (q < w) return q;
 else return w;
}




float qq(int n, float x)
{
 return(   ((doublefact(2*(n-1)))*(powf(x,2*n+1))) / ((doublefact(2*n))*(2*n+1))    );
}


int main()
{
 float x, ff = 0, ff_1 = 100,ff_2=0;
 float n = 0;
 printf("Vvedite_parametr_x: \n");
 scanf("%f", &x);

printf("%f %f %f\n", ff, ff_1, ff_2);
//while ((max(ff,ff_1)-min(ff,ff_1)) >= pow(10,-5))
while (abs((ff-asin(x)))>=pow(10,-5))
 {
 ff_2 = ff_1;
 ff_1 = ff;
 ff += qq(n, x);
 printf("%f %f %f\n", ff, ff_1, ff_2);
 n++;
 }

//for (int i=0;i<10;i++)
printf("The answer is %f\n", ff_1);
 //printf("%d",fact(5));


}