PRADIPSUM - Easy Math

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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

hide comments
majid: 2021-03-01 14:17:41

"Output the sum the of all numbers"
Funny!!

Pranay: 2020-09-04 01:10:18

use long long

asifalim: 2019-11-09 19:32:10

why time limit exceeded occurs again & again?

trhgquan: 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
nidaime: 2019-08-08 03:22:41

Should be moved to tutorials.

kshubham02: 2019-04-19 18:21:06

@prachij
while true, try: s=input() and then
except EOFError: break

Kanish_The_Vista: 2018-10-20 17:42:40

This should be moved to tutorial section

Last edit: 2018-10-20 17:43:42
prachij: 2018-10-19 15:42:55

How to make the "Input is terminated by (end of file)" in python3
Please help.

phoemur: 2018-10-17 03:34:59

This should be moved to tutorial...

Last edit: 2018-10-17 03:38:39
dewa251202: 2018-10-09 15:27:01

you are welcome :)


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