~/algor $ cat masalalar/birdan-n-gacha-yigindi

1 dan n gacha yig'indi

I Muallif: Iqbolshoh Ilhomjonov

Oson 1000 ms 64 MB 4%

Mavzular: Matematika

Natural son n berilgan. 1 + 2 + … + n yig'indisini toping.

Kiruvchi ma'lumotlar

Bitta natural son n.

Chiquvchi ma'lumotlar

Bitta butun son — yig'indi.

Izoh

1 ≤ n ≤ 10⁹

Misollar

Kirish #1

5

Chiqish #1

15

Kirish #2

1

Chiqish #2

1