Submission

Score: 100

User: cyblox_boi

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-16 09:44:02

#include <iostream>
#include <map>
#include <vector>
using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    string word;
    cin >> word;

    map<char, int> frequency;

    for (int i = 0; i < word.length(); i++)
    {
        frequency[word[i]]++;
    }

    for (const auto &i : frequency)
    {
        if (i.second != 1)
        {
            continue;
        }

        cout << i.first << '\n';
        return 0;
    }

    return 0;
}