японцы

{
    struct num
    {
        public string s;
        public int kol;
        public num( int kol1,string s1)
        {
            s = s1;
            kol = kol1;
        }
    }
    class Program
    {
        static void vivod(num [] a,int k,int s)
        {
            double per;
            for (int i = 0; i < k; i++)
            {
                if (a[i].s != "-")
                {
                    per = a[i].kol / s;
                    Console.WriteLine("{0} {1,4:f4}", a[i].s, per);
                }
            }
        }
        static void Main(string[] args)
        {
            const int n = 5;
            num[] a = new num[3 * n];
            a[0].s = "qwert";
            a[1].s = "123";
            a[2].s = "pol";
            a[3].s = "-";
            a[4].s = "123";
            a[5].s = "poli";
            a[6].s = "qwer";
            a[7].s = "124";
            a[8].s = "polia";
            a[9].s = "-";
            a[10].s = "-";
            a[11].s = "-";
            a[12].s = "-";
            a[13].s = "-";
            a[14].s = "pol";

            num[] animal = new num[n];
            num[] ch = new num[n];
            num[] pred = new num[n];
            bool f;
            int k1 = 0, k2 = 0, k3 = 0;
            int su1 = 0, su2 = 0, su3 = 0;
            for (int i = 0; i < 3 * n; i += 3)
            {
                string c1 = a[i].s;
                if (c1 != "-") { su1 += 1; }
                f = true;
                for (int j = 0; j < k1; ++j)
                {
                    if (c1 == animal[j].s)
                    {
                        animal[j].kol += 1;
                        f = false;
                    }
                }
                if (f == true)
                {
                    animal[k1].s = c1;
                    animal[k1].kol = 1;
                    k1++;
                }
                string c2 = a[i + 1].s;
                if (c2 != "-") { su2 += 1; }
                f = true;
                for (int j = 0; j < k2; ++j)
                {
                    if (c2 == ch[j].s)
                    {
                        ch[j].kol += 1;
                        f = false;
                    }
                }
                if (f == true)
                {
                    ch[k2].s = c2;
                    ch[k2].kol = 1;
                    k2++;
                }
                string c3 = a[i + 2].s;
                if (c3 != "-") { su3 += 1; }
                f = true;
                for (int j = 0; j < k3; ++j)
                {
                    if (c3 == pred[j].s)
                    {
                        pred[j].kol += 1;
                        f = false;
                    }
                }
                if (f == true)
                {
                    pred[k3].s = c3;
                    pred[k3].kol = 1;
                    k3++;
                }


            }
            for (int i = 0; i < n; ++i)
            {
                for (int j = i; j < n; ++j)
                {
                    if (animal[j].kol > animal[i].kol)
                    {
                        num p = animal[j];
                        animal[j] = animal[i];
                        animal[i] = p;
                    }
                    if (ch[j].kol > ch[i].kol)
                    {
                        num q = ch[j];
                        ch[j] = ch[i];
                        ch[i] = q;
                    }
                    if (pred[j].kol > pred[i].kol)
                    {
                        num w = pred[j];
                        pred[j] = pred[i];
                        pred[i] = w;
                    }
                }
            }
            vivod(animal, k1, su1);
            vivod(ch, k2, su2);
            vivod(pred, k3, su3);

        }
    }
}