#include <stdio.h>
#include <malloc.h>

void swap(double *x, double *y) {
    double t = *x;
    *x = *y;
    *y = t;
}

double get_mx(double *a, int n, int m) {
    int mx = *a;
    for (int i = 1; i < n; i++) {
        if (mx < *(a + m * i))
            mx = *(a + m * i);
    }
    return mx;
}
void sort(double *a, int n, int m) {
    for (int i = 1; i < n; i++) {
        for (int j = 0; j <  n - i; j++) {
            if (get_mx(a + j, n, m) > get_mx(a + j + 1, n, m)) {
                for (int k = 0; k < n; k++) {
                    swap(a + j + k * m, a + j + 1 + k * m);
                }
            }
        }
    }
}




int main(void) {
    FILE* in = fopen("input.txt", "r");

    int n, m;
    fscanf(in, "%d %d", &n, &m);
    double *a = malloc(n * m * sizeof(double));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            fscanf(in, "%f", a + i * m + j);
        }
    }

    sort(a, n, m);
    for (int i = 0; i < n; i++) {
        double ans = 0;
        for (int j = 0; j < m; j++) {
            ans += (*(a + j)) * (*(a + j + i * m));
        }
    }
    return 0;
}