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CUBEFR - Cube Free Numbers |
A cube free number is a number who’s none of the divisor is a cube number (A cube number is a cube of a integer like 8 (2 * 2 * 2) , 27 (3 * 3 * 3) ). So cube free numbers are 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 17, 18 etc (we will consider 1 as cube free). 8, 16, 24, 27, 32 etc are not cube free number. So the position of 1 among the cube free numbers is 1, position of 2 is 2, 3 is 3 and position of 10 is 9. Given a positive number you have to say if its a cube free number and if yes then tell its position among cube free numbers.
Input
First line of the test case will be the number of test case T (1 <= T <= 100000) . Then T lines follows. On each line you will find a integer number n (1 <= n <= 1000000).
Output
For each input line, print a line containing “Case I: ”, where I is the test case number. Then if it is not a cube free number then print “Not Cube Free”. Otherwise print its position among the cube free numbers.
Example
Sample Input: 10 1 2 3 4 5 6 7 8 9 10 Sample Output: Case 1: 1 Case 2: 2 Case 3: 3 Case 4: 4 Case 5: 5 Case 6: 6 Case 7: 7 Case 8: Not Cube Free Case 9: 8 Case 10: 9
Added by: | Muhammad Ridowan |
Date: | 2011-06-14 |
Time limit: | 0.100s-1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | Own. For alternate thanks Sayef Azad Sakin |
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2013-07-14 19:14:25 Vipul Pandey
i don't know why people are using binary search. just use sieve and that enough to solve this problem. an easy one. |
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2013-06-18 18:10:14 palladium
please provide more test case |
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2013-05-21 13:35:18 -_-
i dont know why i am getting wrong ans.. checked many cases.. pls check dis code http://www.spoj.com/submit/CUBEFR/id=9312881 |
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2013-02-02 18:10:58 Santiago Palacio
Jmm... scanf must be used for this one. |
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2013-01-17 21:38:52 saket diwakar
nice one...:) |
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2012-12-10 07:06:27 J.A.R.V.I.S.
@Adhityaa 1 divides every number. So if u consider 1 as a cube number then all numbers become cube free |
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2012-10-26 17:41:23 Akash Bansal
what is the answer for n=99998 and n=999998 Last edit: 2012-10-26 17:42:09 |
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2012-09-29 14:22:19 eliminator
linear search gives TLE... binary search AC ...... :) |
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2012-09-27 08:12:47 Adhityaa
How is 1 cube free (1 = 1*1*1) ? |