#include <stdio.h>

int findMaxSumRow(int rows, int cols, int matrix[rows][cols]) {
    int maxSum = -2147483647;
    int maxRowIndex = 0;
    
    for (int i = 0; i < rows; i++) {
        int currentSum = 0;
        for (int j = 0; j < cols; j++) {
            currentSum += matrix[i][j];
        }
        if (currentSum > maxSum) {
            maxSum = currentSum;
            maxRowIndex = i;
        }
    }
    return maxRowIndex;
}

int main() {
    int m, n;
    scanf("%d %d", &m, &n);
    
    int matrix[m];
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            scanf("%d", &matrix[i][j]);
        }
    }
    
    int result = findMaxSumRow(m, n, matrix);
    printf("%d\n", result);
    
    return 0;
}