Submission

Score: 100

User: Sunsblad

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.002 second

Submitted On: 2026-10-01 18:11:07

#include<iostream>
#include<string>
#include<vector>
using namespace std;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    vector<int> alph(30);
    string word;
    cin>>word;
    for(int i = 0; i < word.size(); i++){
        alph[int(word[i]) - 65]++;
    }
    for(int i = 0; i < 26; i++){
        if(alph[i] == 1){
            cout<<char(i+65);
            return 0;
        }
    }
}