Submission

Score: 100

User: qweqwe

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-08 17:43:44

#include <bits/stdc++.h>
#define speed cin.tie(0)->sync_with_stdio(0)
#define ll long long
#define pii pair<int,int>
using namespace std;

vector<int> cnt(26,0);

int main(){
	speed;
	string s;cin >> s;
	for (char c:s){
		cnt[c-'A']++;
	}
	for (int i=0;i<26;i++){
		if (cnt[i]==1){
			char a=i+'A';cout << a;return 0;
		}
	}
	return 0;
}