Search found 12 matches

by facug91
6 years ago
Forum: Problem set
Topic: 2658 - Arithmetic Progression
Replies: 7
Views: 930
Gender: None specified

Re: 2658 - Arithmetic Progression

I have the same problem. I haven't done it like you, my solution is more brute force hahaha, but anyway, it's OK and I'm getting Presentation Error, don't know why.
by facug91
6 years ago
Forum: Problem set
Topic: 2649 - Square Factory
Replies: 8
Views: 1902
Gender: None specified

Re: 2649 - Square Factory

Hola, para resolver este problema un amigo encontró la fórmula http://upload.wikimedia.org/math/9/e/7/9e7c01f2e0e095e9f751b268e7ccc039.png donde el a1 sería 1 (el primer elemento) y r sería 4. Cuando lo escribimos con exponenciación rápida modular, en los casos ejemplos endaba, entonces lo subimos y...

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