you have a integral function :

Find the integration by using rectangles with its length is $0\mathrm{.}001$ with the given lower and upper limit

Input Format

$17$

Constraints

$0$ lower limit $100$

$0$ upper limit $100$

Output Format

$-31\mathrm{.}2059$

Do the task with c$++$ and dont forget to check that if i give input a lower limit that is greater than upper limit $,$the program will still run with the correct output