code bằng C++ giúp mik vs ạ

#include<bits/stdc++.h>
#define foru(i,a,b) for(i=a;i<=b;i++)
#define taskname "C_1662"
using namespace std;
string s,x;
string d1,d2;
int main()
{
    if (fopen(taskname".inp", "r")) {
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }
    cin>>s>>x;
    for(int i=0;i<s.size();i++)
        d1[s[i]]++;
    for(int i=0;i<x.size();i++)
        d2[x[i]]++;
    for(char v='a';v<='z';v++)
        if(d1[v]>0 && d2[v]>0)
        cout<<v<<"\n";
    return 0;
}

\begin{array}{c|c|c}\color{#ffd710}{\texttt{\{}} \color{#8655d6}{\texttt{\{}}\ \ \color{#8cdcda}{\text{Daoanhviet96}}\ \ \color{#8655d6}{\texttt{\}}} \color{#ffd710}{\texttt{\}}}\end{array}

$\color{green}{\texttt{C}}\color{lightgreen}{\texttt{+}}\color{lightgreen}{\texttt{+}}$

#include <iostream>
#include <algorithm>

#define all(val) val.begin(), val.end()
#define in(val1, val2) (find(all(val1), val2) != val1.end())

using namespace std;

int main() {

  string x, y;
  getline(cin, x);
  getline(cin, y);

  for (char c='a'; c <= 'z'; ++c) {
    if (in(x, c) && in(y, c)) cout << c << '\n';
  }
  
}