#include <iostream>
#include <vector>
using namespace std; // for test purposes shouldn't be used
void fill(int lines, int cols, vector<vector<int>>& matrix){
for (int i = 0; i < lines; i++){
vector<int> v;
for (int j = 0; j < cols; j++)
v.push_back(1);
matrix.push_back(v);
}
}
int main() {
int lines, cols;
cout << "lines and columns: " << endl;
cin >> lines >> cols;
vector<vector<int>> matrix;
fill(lines, cols, matrix);
for( auto i: matrix){ //print test
for(int j: i)
cout << j;
cout << endl;
}
}