Submission

Score: 30

User: APNICHANAN

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.002 second

Submitted On: 2025-09-24 12:22:29

#include <iostream>
#include <string>
using namespace std;
int main()
{
    string a;
    cin >> a;
    int b[a.length()];
    for (int i = 0; i < a.length(); i++)
    {
        b[i] = 0;
    }

    for (int i = 0; i < a.length(); i++)
    {
        for (int j = i + 1; j < a.length(); j++)
        {
            if (a[i] == a[j])
            {
                b[i] = 2;
                b[j] = 2;
                break;
            }
            if (b[i] == 0)
            {
                b[i] = 1;
                b[j] = 1;
            }
        }
        if (b[i] == 1)
        {
            cout << a[i];
            break;
        }
    }
}