Find Substring

Medium Strings

Solve in Playground →

Problem Statement

Write a C program to find if a substring exists within a string, printing its starting index or -1 if not found.

Input Format

First line: main string. Second line: substring to search.

Output Format

Print the starting index of the substring or -1.

Constraints

Lengths <= 100

Sample Input

programming
gram

Sample Output

Explanation

Search sequentially for the pattern match of the substring inside the main string.

Starter Code

#include <stdio.h>

int main() {
    char str[101], sub[101];
    if (scanf("%100s %100s", str, sub) == 2) {
        // Write your code here to find substring
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

Start Coding in IDE →