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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


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


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


-108  ≤ (a , b) ≤ 108



2 5

5 10




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

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 :)

erik_prasetio: 2018-10-08 14:51:53

thanks lemme try that.

edit: oh thanks alot learned something new at programming

Last edit: 2018-10-08 15:02:52
dewa251202: 2018-10-02 11:09:37

the easiest way is

while(cin >> a >> b)

chhavi96: 2018-09-30 15:02:58

beware of a>b!!
costed me 4 WA

dinesh_kumar23: 2018-09-30 14:34:56

Take care of negative numbers.
And use, while(scanf("%lld%lld" ,&a, &b) != EOF) for input

erik_prasetio: 2018-09-30 12:24:28

How to make the "Input is terminated by (end of file)", I'm new at programming

Added by:Nabil
Time limit:2s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)