#include <iostream>
using namespace std;
 
int main() {
	int n, mat[100][100] = {0}, b, c;
	cin >> n >> b >> c;
	for (int i = 1; i <= n; ++i) {
		int p = b;
		for (int j = 1; j <= n; ++j) {
			if (i % 2 == 0) { // Even rows
                mat[i][j] = n * c - (j - 1) * c;
            } else {          // Odd rows
                mat[i][j] = p;
                p += b;
            }
			cout << mat[i][j] << " ";
		}
		cout << "\n";
	}
	/*
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= n; ++j) {
			cout << mat[i][j] << " ";
		}
		cout << "\n";
	} */
	return 0;
}

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