~/algor $ cat masalalar/a-dan-b-gacha-yigindi
For-08
A dan B gacha yig'indi
Muallif:
Iqbolshoh Ilhomjonov
Oson
1000 ms
64 MB
23%
Ikkita butun son $A$ va $B$ berilgan ($A \le B$). $A$ dan $B$ gacha bo'lgan barcha butun sonlarning yig'indisini hisoblang:
$$S = A + (A + 1) + \dots + B$$
Kiruvchi ma'lumotlar
Bitta qatorda ikkita butun son: $A$ va $B$.
Chiquvchi ma'lumotlar
Bitta butun son — yig'indi.
Izoh
$-10^{5} \le A \le B \le 10^{5}$
Misollar
Kirish #1
1 5
Chiqish #1
15
Kirish #2
3 8
Chiqish #2
33