Chall IndoXploit Looping [C++]

#include <iostream>
#include <stdlib.h>

using namespace std;

int main() {
    int i,j,n,k,awal,nilai,nilai2;

    //system("clear");
    system("figlet IndoXploit");
    cout << "first: ";
    cin >> awal;
    cout << "rows: ";
    cin >> nilai;
    n = nilai + awal;
    cout << "cols: ";
    cin >> nilai2;
    k = nilai2 - 1;
    cout << "\n";
    for(i = awal; i < n; ++i) {
        cout << i - (awal - 1) << " -> " << i << "   ";
        for(j = 1; j <= k; ++j) {
            cout << i + j << "   ";
        }
        cout << endl;
    }
}