Progressiya yig'indisi masalasini qaysi dasturlash tillarida yechish mumkin?

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~/algor $ cat masalalar/progressiya-yigindisi

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Progressiya yig'indisi

Muallif: Iqbolshoh Ilhomjonov

Oson 1000 ms 64 MB 9%

Urinishlar Ulashish

Arifmetik progressiyaning birinchi hadi $a$, ayirmasi $d$ va hadlar soni $n$ berilgan. Progressiya hadlari: $a, \; a + d, \; a + 2 * d, \; \ldots$ Dastlabki $n$ ta had yig'indisi $S$ ni toping.

Arifmetik progressiyaning n ta hadi ustunchalar ko'rinishida: birinchisi a, har biri oldingisidan d ga katta

Kiruvchi ma'lumotlar

Bitta qatorda uchta butun son: $a$, $d$ va $n$.

Chiquvchi ma'lumotlar

Bitta butun son — $S$.

Izoh

$-10^{6} \le a, d \le 10^{6}$
$1 \le n \le 10^{6}$

Misollar

Kirish #1

1 1 5

Chiqish #1

Kirish #2

10 -3 4

Chiqish #2