# Find All Occurrences of a Pattern in a String solved by 886

July 29, 2015, 12:29 a.m. by Rosalind Team

In this problem, we ask a simple question: how many times can one string occur as a substring of another? Recall from “Find the Most Frequent Words in a String” that different occurrences of a substring can overlap with each other. For example, $\color{green}\textbf{ATA}$ occurs three times in $\text{CG}\color{green}\textbf{ATATA}\color{black}\text{TCC}\color{green}\textbf{ATA}\color{black}\text{G}$.

## Pattern Matching Problem

Find all occurrences of a pattern in a string.

Given: Strings Pattern and Genome.

Return: All starting positions in Genome where Pattern appears as a substring. Use 0-based indexing.

## Sample Dataset

ATAT
GATATATGCATATACTT

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