突发奇想用排列做，没超时但答案错了

#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
using namespace std;

int main()
{
    int a,b,c; cin >> a >> b >> c;
    string s = "123456789";
    do
    {
        if ((stoi(s.substr(0, 3)))*b == (stoi(s.substr(3, 3)))*a &&(stoi(s.substr(3, 3)))*c == (stoi(s.substr(6, 3)))*b && (stoi(s.substr(0, 3))) * c == (stoi(s.substr(6, 3))) * a)
        {
            vector<long long>x;
            x.push_back(stoi(s.substr(0, 3)));
            x.push_back(stoi(s.substr(3, 3)));
            x.push_back(stoi(s.substr(6, 3)));
            sort(x.begin(), x.end());
            for (long long i : x)cout << i << ' ';
            cout << endl;
        }
    } while (next_permutation(s.begin(), s.end()));

    return 0;
}