~/algor $ cat masalalar/faktoriallar-yigindisi
For-24
Faktoriallar yig'indisi
Muallif:
Iqbolshoh Ilhomjonov
Oson
1000 ms
64 MB
29%
Natural son $N$ berilgan. Dastlabki $N$ ta natural son faktoriallarining yig'indisini hisoblang:
$$S = 1! + 2! + 3! + \dots + N!, \qquad k! = 1 * 2 * \dots * k$$
Kiruvchi ma'lumotlar
Bitta natural son $N$.
Chiquvchi ma'lumotlar
Bitta butun son — $S$.
Izoh
$1 \le N \le 20$
Misollar
Kirish #1
1
Chiqish #1
1
Kirish #2
2
Chiqish #2
3