Find the Index of the First Occurrence of the String

Given two strings s and p, return an index i of the first occurrence of p in s. If p occurs multiple times, you must return the smallest index. If p does not occur in s, return -1. Any leading zeros in p should be treated as such, i.e. the function should return correct value if p contains leading zeros.

Example 1:

Input:s = "abxaba", p = "ab"

Output:0

Example 2:

Input:s = "mississippi", p = "issi"

Output:1

Example 3:

Input:s = "wordgoodgoodgoodbestword", p = "word"

Output:10

Constraints:

0 <= s.length <= 100
0 <= p.length <= 100
s and p contain only lowercase English letters

solution.cpp

Run code to see test results