Flipped numbers

[Mr potato19]

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int i, row_nr;

cin >> row_nr;

for (i = 1; i <= row_nr; i++)
{
for(int j=0;j<row_nr;j++)
{
cout << i + j*(row_nr)<< " ";
}
cout << endl;
}

return 0;
}


the code worsk perfectly but how can i make it the numbers to stop at 30 so it wont go 36 37..etc

[tpb]

Your question makes no sense.
What does "flipped" mean?
What numbers are "flipped"?
What in the world do you mean by "stop at 30"?

[Mr potato19]

I want this code to give the result
1 4 7
2 5 8
3 6 9

now it gives me the result but the exericse says make N from 1 to 30 my code continues 36 37 38 how can i stop that