Lab1

using System;

namespace Lab1
{
    class Program
    {
        static double f(double x)
        {
            double s = 0;
            if (x > 3)
            {
                double p = Math.Sin(x);
                double sq = p * p;
                for (int i = 1; i <= 17; i += 2)
                {
                    s += p;
                    p *= sq;
                }
                return s;
            }
            s = 15;
            double t = x;
            for (int i = 0; i < 5; i++)
            {
                t = Math.Tan(t);
                s += t;
            }
            return s;
        }

        static void Main(string[] args)
        {
            Console.Write("a = ");
            double a = double.Parse(Console.ReadLine());
            Console.Write("b = ");
            double b = double.Parse(Console.ReadLine());
            double fa = f(a);
            double fb = f(b);
            double u = fa > fb ? fa : fb;
            //Console.WriteLine("f(a) = " + fa);
            //Console.WriteLine("f(b) = " + fb);
            Console.WriteLine("u = " + u);
        }
    }
}