import java.util.Scanner;

class Matrix {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter size of matrix");
        int m = sc.nextInt();
        int n = sc.nextInt();
        double[][] matrix = new double[m][n];
        int zeroCount = 0;

        System.out.println("Enter the elements of the matrix");
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                matrix[i][j] = sc.nextDouble();
                if (matrix[i][j] == 0) {
                    zeroCount++;
                }
            }
        }

        if (zeroCount > (m * n) / 2) {
            System.out.println("It is a sparse matrix");
        } else {
            System.out.println("It is not a sparse matrix");
        }
    }
}