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Diferente pentru ciorna intre reviziile #19 si #18

Diferente intre #19 si #20
Diferente intre #17 si #18

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** Fast Walsh-Hamard transform
*** Probleme: 'Random NIM Generator':https://csacademy.com/contest/archive/#task/random_nim_generator/, 'And-Closure':https://csacademy.com/contest/archive/#task/and-closure/
** Mixed radix

*** Probleme: 'POLYEVAL':https://www.codechef.com/JULY16/problems/POLYEVAL

** Smenul cu divide et impera
*** Probleme: 'CF 438E':http://codeforces.com/contest/438/problem/E, 'CF 553E':http://codeforces.com/contest/553/problem/E, 'Jetpack':https://csacademy.com/contest/round-9/#task/jetpack
* 'Eliminare Gaussiana':problema/gauss

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