Submission

Score: 100

User: chokun

Problemset: สตริงซ้ำซ้ำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-07 10:14:38

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

int main(){
    string str1, str2;
    cin >> str1 >> str2;

    unordered_set <char>  set2;
    for(char c : str2){
        set2.insert(c);
    }

    unordered_set <char> printed;

    bool first = true;
    for(char c : str1){
        if(set2.count(c) && !printed.count(c)){
            if(!first){
                cout << " ";
            }
            cout << c;
            printed.insert(c);
            first = false;
        }
    }
}