APS - Amazing Prime Sequence
Bablu is very fond of Series and Sequences...
After studying Fibonacci Series in Class IX, he was impressed and he designed his own sequence as follows...
a[0] = a[1] = 0
For n > 1, a[n] = a[n - 1] + f(n), where f(n) is smallest prime factor of n.
He is also very fond of programming and thus made a small program to find a[n], but since he is in Class IX, he is not very good at programming. So, he asks you for help. Your task is to find a[n] for the above sequence....
Input
Your code will be checked for multiple Test Cases.
First Line of Input contains T (<= 100), the number of Test Cases.
Next T lines contain a single number N. (1 < N < 10^7).
Output
Single line containing a[n] i.e. nth number of the sequence for each test case.
Example
Input: 3 2 3 4 Output: 2 5 7
hide comments
thanhdatmu2003:
2021-12-12 03:30:22
becareful a[n] can be long long |
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princemishra:
2020-10-23 11:27:37
AC In One Go |
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ameyanator:
2018-09-26 12:48:58
nice sieve question |
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maxboom321:
2018-09-20 06:55:18
Simple precalculation :D! |
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sonuverma:
2018-07-02 12:01:42
Pre-computation and Pre-computation :) |
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m2do:
2018-01-07 17:26:55
aims at optimisation |
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rayhan50001:
2017-08-14 00:50:35
AC In One Go. 18th.. :D dp
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pratham_1:
2017-07-15 17:41:13
Awesome sieve+dp:) Ac in 3 go , dont forget to use long long answers are explosive:) |
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rohit9934:
2017-07-11 15:41:20
sieve+pre-computation gives :) |
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habibpqt619:
2017-06-30 17:35:24
weak test cases
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Added by: | c[R]@zY f[R]0G |
Date: | 2013-02-14 |
Time limit: | 1s |
Source limit: | 5000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |