Submission

Score: 100

User: cheeseycheese05

Problemset: สตริงซ้ำซ้ำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-13 16:54:28

#include <iostream>
#include <unordered_set>
#include <algorithm>

using namespace std;

int main(){
    string word1, word2;
    cin >> word1;
    cin >> word2;
    unordered_set<char> letters;
    for(char& letter : word1) letters.insert(letter);
    for(char& letter : word2) if(letters.find(letter) != letters.end()) {cout << letter << ' '; letters.erase(letter);}
    return 0;
}