PRADIPSUM - Easy Math

Zoro is a student of a primary school. He likes to solve mathematical problem. One day he tries to solve a math, but he is unable to solve the problem efficiently because of being a student of primary school. As you are a programmer he wants your help to solve this problem. The problem is to find the sum of some consecutive numbers.

Example, if the first number is 2 and the last number is 5, then the result would be

2 + 3 + 4 + 5 = 14

Input

Every line contains two integers a and b. Input is terminated by the end of file.

Output

Output the sum the of all numbers between a and b (inclusively).

Constraints

-108  ≤ (a , b) ≤ 108

Example

Input:
2 5
5 10

Output:
14
45

Added by:Nabil
Date:2018-09-26
Time limit:2s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All

hide comments
2021-03-01 14:17:41 majid
"Output the sum the of all numbers"
Funny!!
2020-09-04 01:10:18 Pranay
use long long
2019-11-09 19:32:10
why time limit exceeded occurs again & again?
2019-11-09 19:21:41
Notice the input's position. Also this should be moved to the tutorial section.

Last edit: 2019-11-09 19:22:01
2019-08-08 03:22:41
Should be moved to tutorials.
2019-04-19 18:21:06
@prachij
while true, try: s=input() and then
except EOFError: break
2018-10-20 17:42:40 Kanish_The_Vista
This should be moved to tutorial section



Last edit: 2018-10-20 17:43:42
2018-10-19 15:42:55
How to make the "Input is terminated by (end of file)" in python3
Please help.
2018-10-17 03:34:59
This should be moved to tutorial...

Last edit: 2018-10-17 03:38:39
2018-10-09 15:27:01
you are welcome :)
© Spoj.com. All Rights Reserved. Spoj uses Sphere Engine™ © by Sphere Research Labs.