Solve the Equation

Time Limit: 1 sec

**The Problem**

Consider a particle moving along a straight line with uniform acceleration 'a'. At t=0, let the particle be at A and u be its initial velocity and when t = t, v be its final velocity.

From the above equation you have to find the value of **v** where the value of **u**, **a** and **t** are given.

**The Input**

Input file contain several lines of input. Each line consists of three positive integers denotes **u**, **a** and **t, **all integers are less than or equal to 100 in the input file. Input is terminated by EOF.

**The Output**

For each line of input you have to print the value of **v **in a line.

**Sample Input**

1 2 3

100 100 100

**Sample Output**

7

10100

Inter University Programming Contest - 2015 [BGC Trust University Bangladesh]

Problem Setter: Hasnayn Ahmed Shakil