First Non-Repeating Character

Medium Strings

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Problem Statement

Write a C++ program that reads a string and finds the first non-repeating character, printing ‘$’ if none exists.

Input Format

A single word string S.

Output Format

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

Constraints

1 <= Length <= 100

Sample Input

leetcode

Sample Output

Explanation

Finds the first character with a frequency count of 1.

Starter Code

#include <iostream>
#include <string>
#include <unordered_map>

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

Limits

Time Limit: 1s
Memory Limit: 256MB

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