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#include<stdio.h>
float func(float x,float y);
int main()
{
float m1,m2,m3,m4,m,h=0.3;
float x0 = 0.3, y0 = 5, xn;
scanf("%f",&xn);
while(x0<xn)
{
m1=func(x0,y0);
m2=func((x0+h/2.0),(y0+m1*h/2));
m3=func((x0+h/2.0),(y0+m2*h/2));
m4=func((x0+h),(y0+m3*h));
m=((m1+2*m2+2*m3+m4)/6);
y0=y0+m*h;
x0=x0+h;
}
printf("y=%f",y0); // Final output
return 0;
}
float func(float x,float y)
{
float m;
m=(x*(x+1)-3*y*y*y)/10;
return m;
}
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