HJ9题解 | #提取不重复的整数#

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
using namespace std;
int main()
{
    string str;
    vector<int> ve(10, 0);
    cin>>str;
    reverse(str.begin(), str.end());
    for (int i=0; i<str.size(); i++)
    {
        if(ve[(int)(str[i])] == 0)
        {
            cout<<str[i];
            ve[(int)(str[i])] = 1;
        }
    }
}