Submission

Score: 100

User: colo39

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.005 second

Submitted On: 2026-10-01 13:55:39

#include <bits/stdc++.h>
using namespace std;
map<char,int> mp;
int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    string s;
    cin >> s;
    for (auto c : s) {
        mp[c]++;
    }
    vector<char> vec;
    for (auto c : s) {
        if (mp[c] == 1) {vec.push_back(c);}
    }    

    sort(vec.begin(),vec.end());
    //for (auto c : vec) cout << c << endl;
    cout << vec[0];
    
}