First Non-Repeating Character

Problem Statement

Input Format

A single word string S.

Output Format

Print the first non-repeating character or '$'.

Constraints

1 <= Length <= 100

Sample Input

swiss

Sample Output

w

Explanation

In 'swiss', 's' repeats, but 'w' and 'i' are unique. 'w' appears first.

Starter Code

#include <stdio.h>

int main() {
    char s[101];
    if (scanf("%100s", s) == 1) {
        // Write your code here
    }
    return 0;
}

Limits

• Time Limit: 1s
• Memory Limit: 256MB