21-Maktab training #1
Contest Problems
Problem Tasks
# Date State
Not Contest
# Date State

1. Summa

Time limit : 1000 ms
Memory limit : 64 mb

1 dan n gacha sonlar berilgan. Berilgan sonlarni yig`indisini toping.

Kiruvchi ma’lumotlar:

Bitta butun son $n (1\le n\le 100)$

Chiquvchi ma’lumotlar:

Bitta son masala yechimi.

Input
4
Output
10
Input
9
Output
45