Contest Editorial - Codeforces

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Contest Editorial

Revision en19, by Adam_Jardali, 2024-09-29 15:20:21

Hadi & Math

What is the Sum of the numbers from 1 ... n

hint

Knowing the actual sum and the excepted sum, how to find the missing sum?

solution

tip

Michael And The Easy A

hint 1

hint 2

hint 3

Revisions

Rev.	By	When	Δ	Comment
en21	Adam_Jardali	2024-09-29 15:21:24	0	(published)
en20	Adam_Jardali	2024-09-29 15:21:11	6
en19	Adam_Jardali	2024-09-29 15:20:21	2
en18	Adam_Jardali	2024-09-29 15:19:51	2
en17	Adam_Jardali	2024-09-29 15:19:35	3
en16	Adam_Jardali	2024-09-29 15:18:45	127
en15	Adam_Jardali	2024-09-29 15:17:28	12
en14	Adam_Jardali	2024-09-29 15:16:48	10
en13	Adam_Jardali	2024-09-29 15:16:12	238
en12	Adam_Jardali	2024-09-29 15:13:04	113
en11	Adam_Jardali	2024-09-29 15:11:34	11	Tiny change: 'n(n+1)/2 (-) sum(Array' -> 'n(n+1)/2 - sum(Array'
en10	Adam_Jardali	2024-09-29 15:11:19	27	Tiny change: 'n(n+1)/2 — sum(Array' -> 'n(n+1)/2 (-) sum(Array'
en9	Adam_Jardali	2024-09-29 15:09:57	21
en8	Adam_Jardali	2024-09-29 15:09:18	5
en7	Adam_Jardali	2024-09-29 15:08:57	161
en6	Adam_Jardali	2024-09-29 15:07:22	108
en5	Adam_Jardali	2024-09-29 15:06:41	0	Tiny change: 'Math\n\n' -> 'Math\n\n- What is the Sum of the numbers from 1 ... n'
en4	Adam_Jardali	2024-09-29 15:06:14	9	Tiny change: 'Math\n\n' -> 'Math\n\n- What is the Sum of the numbers from 1 ... n'
en3	Adam_Jardali	2024-09-29 15:05:53	48	Tiny change: 'Math\n\n' -> 'Math\n\n- What is the Sum of the numbers from 1 ... n'
en2	Adam_Jardali	2024-09-29 15:05:33	45	Tiny change: 'Math\n\n' -> 'Math\n\n- What is the Sum of the numbers from 1 ... n'
en1	Adam_Jardali	2024-09-29 15:02:42	24	Initial revision (saved to drafts)