###1) Given a matrix consisting of 0's and 1's, find the maximum size sub-matrix consisting of only 1's: problema relacionado: submeter
###2) Given an array containing both positive and negative integers, find the contiguous array with the maximum sum.
problemas relacionados:
Caminhos do Reino: prova submeter
Metrô (nao exatamente mas é legal pra treinar): submeter
Subway: submeter