~/algor $ cat masalalar/for-leybnis-qatori
For-28
Leybnis qatori
Muallif:
Iqbolshoh Ilhomjonov
Oson
1000 ms
64 MB
30%
Natural son $n$ berilgan. $\pi$ sonini Leybnis qatori bilan taxminan hisoblang: qavs ichidagi dastlabki $n$ ta had yig'indisini $4$ ga ko'paytiring:
$$S = 4 * \left(1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \dots + \frac{(-1)^{n-1}}{2 * n - 1}\right)$$
Kiruvchi ma'lumotlar
Bitta natural son $n$.
Chiquvchi ma'lumotlar
Bitta son — $S$, nuqtadan keyin aynan 6 ta raqam bilan (masalan, 4.000000).
Izoh
$1 \le n \le 10^{6}$
Misollar
Kirish #1
1
Chiqish #1
4.000000
Kirish #2
3
Chiqish #2
3.466667