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
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Contest Editorial
Hadi & Math
What is the Sum of the numbers from 1 ... n
excepted_sum = n*(n+1)/2
Knowing the actual sum and the excepted sum, how to find the missing sum?
answer = n*(n+1)/2 — sum(Array)
For c++ users use long long, and for java users long to avoid overflow
Michael And The Easy A
What is the maximum sum we can have if we have even numbers of negative integers?
What about odd number oof negative integers?
Rev. | Язык | Кто | Когда | Δ | Комментарий | |
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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) |
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