String Contains Substring Problem

String Contains Substring Problem — ExecCode School DSA Practice

Solve the String Contains Substring problem on ExecCode. Free online school DSA practice in Strings - Basics. Write and run code in Java, C++, Python — no signup required to run.

Problem description

Given two strings, find the starting index of the first occurrence of the second string within the first string. Your task is to solve String Contains Substring. If the second string is not found, print -1.

Examples

Input hello world world; Output 6. Input the quick brown fox dog; Output -1

Constraints

1 <= len(S1),len(S2) <= 10^4

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