2d vector data combination

hi i need help to arrange a 2d vector data combination . i don't know how to ask this . in the code below i created a small version of what i want but when the vector get bigger what i do i can't think an other way

Code:

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

using namespace std;

int main() {

        vector<vector<string>> Data;
        vector<string> a;

        Data.push_back(a);
        Data.push_back(a);
        Data.push_back(a);

        Data[0].push_back("0af5d24d");
        Data[0].push_back("45f2r");
        Data[0].push_back("245gd");
        Data[0].push_back("0");
        Data[0].push_back("02");

        Data[1].push_back("df5");
        Data[1].push_back("0");
        Data[1].push_back("245s1");
       

        Data[2].push_back("754g5h");
        Data[2].push_back("f2g1fg45f5");
        Data[2].push_back("125");       
        Data[2].push_back("24415");


        for (int i = 0; i < Data[0].size(); i++) {

                for (int j = 0; j < Data[1].size(); j++) {

                        for (int k = 0; k < Data[2].size(); k++) {


                                cout << Data[0][i] << Data[0][j] << Data[0][k] << endl;
                              // add all 3 vector data into a 1d char array

                        }


                }


        }





        return 0;
}

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Code:

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        for (int i = 0; i < Data[0].size(); i++) {
                for (int j = 0; j < Data[1].size(); j++) {
                        for (int k = 0; k < Data[2].size(); k++) {
                                cout << Data[0][i] << Data[0][j] << Data[0][k] << endl;

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There seems to be a problem with this code. j is from 0 to Data[1].size(), but in the cout statement j is used with Data[0] - same issue with k?? This code only appears to work because in the example Data[0] has more elements present than either Data[1] or Data[2]. But when Data[0] has fewer elements... Do you mean

Code:

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cout << Data[0][i] << Data[1][j] << Data[2][k] << endl;

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yes your right sorry :) . how can i code the same functionality for big vector ( this vector only have size = 3 , what if i have a vector size that above 1000 )

Quote:

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what if i have a vector size that above 1000

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Apart from the coding nightmare (although you could write a program to generate the code that could then be included in the main program), have you considered the complexity of this. Even if this was re-done using recursion somehow, the run-time complexity ...

What are you trying to achieve?

:) run-time complexity is not a problem i am a very patient it not a problem its run over a month or more because i need to find a single answer if there any way to solve this problem plz show me . if its successful i will show you a cool thing

Yes, but what are you trying to achieve?

something impossible . trust me its going to be cool plz help

As don't know the purpose and the usage of the code, we can't provide further assistance.