Submission

Score: 100

User: Patn01Z

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.002 second

Submitted On: 2026-09-28 16:33:25

#include <iostream>
#include <cmath>
using namespace std;

int main(){
    string word;
    cin >> word;
    int wl = word.length();
    for(int i=0;i<wl;i++){
        for(int j=0;j<wl-1-i;j++){
            if(word[j]>word[j+1]){
                swap(word[j],word[j+1]);
            }
        }
    }
    for(int i=0;i<wl;i++){
        if(i==0){
            if(word[i]!=word[i+1]){
                cout << word[i];
                break;
            }
        }
        else if((i>0)&&(i<(wl-1))){
            if((word[i]!=word[i+1])&&(word[i]!=word[i-1])){
                cout << word[i];
                break;
            }
        }
        else{
            if(word[i]!=word[i-1]){
                cout << word[i];
                break;
            }
        }
    }
}