209 - Professor’s Homework

Professor’s Homework

Time Limit: 1 sec

**The Problem**

**Nora** is learning summation of numbers. So her **Professor** has given her homework “Summation of numbers from **1** to **N**”. Can you help **Nora** to complete her homework?

**1**** + ****2**** + ****3**** + … + ****N**** = ****???**

**The Input**

The input file contains 1 integer number **N** (**N**<=200).

**The Output**

Output will show the sum of series **1** to **N** numbers in a separate line.

**Sample Input**

125

**Sample Output**

7875

Problem Setter: Shahin ShamS

Special thanks to Samia Safa Ahmed