Help please with study

Question

#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
srand(0);
int range;
int n;
cin >> range;
cin>>n;

for (int x=0; x<4; x++){

for (n=0; n<10; n++){

cout<<rand()%10;
}

}
return 0;
}

Answer 1

Please post the question too

Answer 2

The task is named "Password for briefcase". 40.2 item.