import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int m = sc.nextInt();
        int n = sc.nextInt();

        if (m <= 0 || n <= 0) {
            System.out.println("Invalid input");
            return;
        }

        int[][] matrix = new int[m][n];

        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                matrix[i][j] = sc.nextInt();
            }
        }

        int maxSum = Integer.MIN_VALUE;
        int maxRowIndex = -1;
        for (int i = 0; i < m; i++) {
            int rowSum = 0;
            for (int j = 0; j < n; j++) {
                rowSum += matrix[i][j];
            }
            if (rowSum > maxSum) {
                maxSum = rowSum;
                maxRowIndex = i;
            }
        }

        System.out.println(maxRowIndex);
    }
}