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What are the differences between NP, NP-Complete and NP-Hard?

...atements of the form (x_v11 OR x_v21 OR x_v31) AND (x_v12 OR x_v22 OR x_v32) AND ... AND (x_v1n OR x_v2n OR x_v3n) where each x_vij is a boolean variable or the negation of a variable from a finite predefined list (x_1, x_2, ... x_n). It can be shown that every NP probl...
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How to remove unreferenced blobs from my git repo

...ultiplyByZer0 3,73333 gold badges2727 silver badges4646 bronze badges answered Feb 6 '13 at 12:06 Sam WatkinsSam Watkins 5,89733 g...
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“Unknown provider: aProvider

... Ash ClarkeAsh Clarke 4,3643232 silver badges4343 bronze badges 2 ...
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Iteration over std::vector: unsigned vs signed index variable

...ame as unsigned int, which can lead to programming errors, particularly as 64-bit architectures become more prevalent. share | improve this answer |
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Add one row to pandas DataFrame

...Simple df2.loc[i] = ... would do. For me it reduced the time from 10s to 8.64s – krassowski Jan 23 '19 at 20:44 Please...
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A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7

... hpiquehpique 110k125125 gold badges323323 silver badges460460 bronze badges 2 ...
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What is the best practice for dealing with passwords in git repositories?

... Git (weak solution) Environment variables: https://stackoverflow.com/a/30664318/3070485 Config.example: https://stackoverflow.com/a/2397905/3070485 Command line parameter: manually enter password on program startup or 2. Make repository accessible only to authorized people I.e. people that are ...
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What is a non-capturing group in regular expressions?

... their order (thanks to named groups)... regexhero.net/tester/?id=16892996-64d4-4f10-860a-24f28dad7e30 – Steve Wortham Aug 19 '10 at 15:43 2 ...
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Getting output of system() calls in Ruby

... Denis de BernardyDenis de Bernardy 64.9k1111 gold badges109109 silver badges134134 bronze badges ...
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What's the difference between utf8_general_ci and utf8_unicode_ci?

...4. – Stijn de Witt Jun 14 '16 at 17:32  |  show 22 more comments ...