Substring Search

Medium Strings PRO

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Problem Statement

Write a C++ program that reads a main string and a pattern substring, then finds the first occurrence index of the pattern.

Input Format

First line: Main string S. Second line: Substring pattern P.

Output Format

Print the starting index of the pattern, or -1 if not found.

Constraints

1 <= Length <= 100

Sample Input

helloworld
world

Sample Output

Explanation

Uses standard string search routines like `.find()` to locate substrings.

Starter Code

#include <iostream>
#include <string>

int main() {
    std::string s, p;
    if (std::cin >> s >> p) {
        // Write your code here
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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