Back to High School Physics#1543
Some particle starts moving from rest with constant acceleration. After time from the start of the motion, the particle's velocity becomes . What distance will the particle travel in time ?
Each line is a separate test and contains two integers: the particle's velocity (0 \le v \le 100) and the time (0 \le t \le 200) at which the particle reached this velocity.
For each test, print the distance the particle will move in time on a separate line.
Example 1