Submission

Score: 100

User: .n0t_gloomy.

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-09-29 22:07:28

#include <bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    cin>>s;
    int n = s.length();
    vector<int> v (26,0);
    for (int i = 0; i < n; i++)
    {
        v[s[i]-'A']++;
    }
    for (int i = 0; i < 26; i++)
    {
        if (v[i] == 1)
        {
            cout<<char(i+'A')<<"\n";
            break;
        }
    }
    return 0;
}