Submission

Score: 20

User: Apimuk

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-05 12:49:17

#include <iostream>
#include <bits/stdc++.h>
using namespace std;


int main()
{
    string txt;
    cin >> txt;
    int sz = txt.length();
    vector<char> t;
    for(int i = 0 ; i< sz ; i++){
        t.push_back(txt[i]);
    }
    for(int i = 0  ;i < sz ; i++){
        if(find(t.begin()+i+1,t.end(),txt[i]) == t.end()){
            cout << txt[i];
            return 0;
        }
    }
}