double f(int n,double a[],double x)
{
double sum=0,mul=1;
for(int i=0;i<=n;i++)
{
sum+=a[i]*mul;
mul*=x;
}
return sum;
}
double f(int n,double a[],double x)
{
double sum=0,mul=1;
for(int i=0;i<=n;i++)
{
sum+=a[i]*mul;
mul*=x;
}
return sum;
}