Submission

Score: 100

User: tha_smith

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-09-27 19:40:24

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

int main() {
	string s;
	cin >> s;
	int alp[26] = {0};
	for(int i=0; i<s.size(); i++) {
	    alp[s[i]-'A']++;
	}
	for(int i=0; i<26; i++) {
	    if(alp[i]==1) {
	        cout << char('A'+ i);
	        break;
	    }
	}
}