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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static  int fact(int M) {
  11. 		if (M == 0)
  12. 			return 1; // возвращаем факториал от нуля, это 1 =)
  13. 		else // Во всех остальных случаях
  14. 			return M * fact(M - 1); // делаем рекурсию.
  15. 		}
  16.  
  17. 	public static void main (String[] args) throws java.lang.Exception
  18. 	{
  19. 		int n, u, v, a, b, t, sum;
  20. 		Scanner scanIn = new Scanner(System.in);      
  21. 		n = scanIn.nextInt();
  22. 		u = scanIn.nextInt();
  23. 		v = scanIn.nextInt();
  24. 		int k; // счетчик цикла
  25. 		a = u;
  26. 		b = v;
  27. 		k = 1;
  28. 		sum = a * b / fact(k + 1);
  29. 		for (k = 2; k <= n; k++) {
  30. 			t = a;
  31. 			a = 2 * b + a;
  32. 			b = 2 * t * t + b;
  33. 			sum = sum + (a * b / fact(k + 1));
  34. 		}
  35.  
  36. 		System.out.println("Сумма ряда равна: " + sum);
  37. 	}
  38. }
Success #stdin #stdout 0.06s 4386816KB
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Сумма ряда равна: 64
https://ideone.com/vJcAZ7
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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