Submission

Score: 100

User: matcherbrainner

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-03 16:01:34

#include<bits/stdc++.h>
using namespace std;
int main(){
	string l;
	cin>>l;
	vector<int>freq(26,0);
	for(char c:l){
		freq[c-'A']++;
	}
	for(int i=0;i<26;i++){
		if(freq[i]==1){
			cout<<(char)('A'+i);
			break;
		}
	}
}