c++ affich hexa

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
int main()
{
    int number;
    cin >> hex >> number; cin.ignore();
    cout << dec << number << endl;
}