Talk:Primes - allocate descendants to their ancestors: Difference between revisions
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So... would it be possible to rephrase the task to address these issues? --[[User:Rdm|Rdm]] ([[User talk:Rdm|talk]]) 02:53, 26 February 2015 (UTC) |
So... would it be possible to rephrase the task to address these issues? --[[User:Rdm|Rdm]] ([[User talk:Rdm|talk]]) 02:53, 26 February 2015 (UTC) |
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:Hi, too. |
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(1) Timing. I already addressed this question, yesterday. See my answer to Paddy3118, point 3, above. |
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(2) I posted "... is to add the decomposition into prime factors of a number to get its 'ancestors'". |
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What difference does it make if there are more than 2 prime factors ? |
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I also gave the example of 3^33 = 5.559.060.566.555.523 (parent 99). |
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That is, 3^33 --> 3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3 = 99 |
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The ancestor lists has to be provided for a delimited set of ancestors (from 5 to 99), see the task description. |
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And, yes, some ancestors may have common ancestors. |
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(3) If 25 is the Parent of 46, you can deduct that 46 is a descendant (child) of 25. |
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And I posted : "... use the decomposition into primes for all the numbers between 5 and 3^33". |
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The 557 descendants of the ancestor 46 are posted, since yesterday, see my answer to Paddy3118, point 1, above. |
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MAXPARENT is clearly stated in the task description (ancestors from 5 to 99). |
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MAXPRIME is also clearly stated in the task description "You only have to consider the prime factors < 100". |
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This information could also have been deducted from MAXPARENT. |
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And, yes, 99 is not a prime factor. MAXPRIME is given as an upper bound. |
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MAXPRIME is used to get a list of all the prime factors which are lower than (or equal to) MAXPRIME. |
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NBRPRIMES and NBRANCESTORS are only used to delimit the size of 2 tables. They are not relevant to solve the problem. |
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malloc(sizeof(Children)) |
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Thanks, for this information, it's a typo, my compiler didn't even warn me on that. I changed the C code. |
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malloc(sizeof(struct Children)) |
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I posted one solution, there are maybe hundreds. |
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Hope it helps! |
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--[[User:Old man|Old man]] ([[User talk:Old man|talk]]) 10:39, 26 February 2015 (UTC) |
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