Submission

Score: 30

User: Mano

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-10 09:18:57

#include<iostream>
#include<cctype>
using namespace std;
int main(){
    string s;
    int alp[26]={};
    cin>>s;
    if(s.length()>20){
        return 0;
    }
    for(char ch:s){
        alp[ch-'A']++;
    }
    for(char ch:s){
        if(alp[ch-'A']==1){
            cout<<ch<<'\n';
            break;
        }
    }
    return 0;
}