Submission

Score: 100

User: Sun999

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.005 second

Submitted On: 2026-10-09 22:39:30

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

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	string s;
	cin>>s;
	char first = 'z';
	int size = s.length();
	bool dul = true;
		for(int i=0; i<size; i++){
			dul = true;
			for(int j=0; j<size; j++){
				if(s[i]== s[j] && i!=j){
					dul = false;
					continue;
				}
	
			}
			if(dul){
				if(s[i] < first){
					first = s[i];
					}
			}
			
		}	

	cout<<first<<'\n';
	
	return 0;
}