Submission

Score: 20

User: Mano

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-03 11:54:21

#include<iostream>
#include<string>
using namespace std;
int main(){
    string s;
    int z=30;
    bool b=true;
    char a;
    cin>>s;
    if(s.length()>20){
        cout<<"ERROR";
        return 0;
    }
    for(int i=0;i<s.length()-1;i++){
        a=s[i];
        b=true;
        for(int j=i+1;j<s.length();j++){
            if(a==s[j]){
                b=false;
                break;
            }
        }
        if(b==true){
            z=i;
            break;
        }
    }
    if(z!=30){
        cout<<s[z];
    }
    else{
        cout<<"None";
    }
    return 0;
}