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ONEZERO - Ones and zeros |
Certain positive integers have their decimal representation consisting only of ones and zeros, and having at least one digit one, e.g. 101. If a positive integer does not have such a property, one can try to multiply it by some positive integer to find out whether the product has this property.
Input
Number K of test cases (K is approximately 1000);
In each of the next K lines there is one integer n (1 ≤ n ≤ 20000)
Output
For each test case, your program should compute the smallest multiple of the number n consisting only of digits 1 and 0 (beginning with 1).
Example
Input: 3 17 11011 17 Output: 11101 11011 11101
Added by: | Paweł Dobrzycki |
Date: | 2005-05-26 |
Time limit: | 8s |
Source limit: | 4096B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: NODEJS PERL6 VB.NET |
Resource: | II Polish Olympiad in Informatics, Ist Stage |
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2017-01-20 15:26:54
Great question on bfs :) |
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2017-01-07 14:43:53
best question on bfs ^_^ |
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2017-01-04 21:15:17
nice question!! beware of- 1. long long overflow...use strings 2. try testcase 999,9999 3. modular arithmetic |
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2016-10-25 14:39:02
really ,cool logic! though i couldn't crack :P Last edit: 2016-10-25 14:39:24 |
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2016-10-16 18:16:41
instead of using bfs, we can use a counter. counter is basically a number counter. but when u notice carefully, 1 -> 1, 2 -> 10, 3 -> 11, 4 -> 100 .... the binary representation of the counter value converted into equivalent decimal value can help us solve the problem. eg when value of counter is 5 -> 101 in binary, the number which we want would be 101 in decimal. |
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2016-09-03 16:51:31
BFS + Backtracking ! AC ! :) |
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2016-09-02 17:55:18 Sarthak Munshi
storing string or integer is trivial . Just store the remainder of leftchild%n and rightchild%n and check each of those to be 0 . |
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2016-08-19 12:39:17
backtracking :) Last edit: 2016-08-19 12:56:01 |
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2016-08-14 12:39:19
weak test cases try 999. |
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2016-08-12 19:26:40
Got AC in one, 0,98 Check modular arithmetic https://brilliant.org/wiki/modular-arithmetic/ |