#include <stdio.h>
#include <stdlib.h>
#include <math.h>



int printf_Matrix(double* M, int n, int m, FILE *fp);//fp == NULL -> into console
int printf_Matrix(double* M, int n, int m, FILE *fp)
{

    for (int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            fprintf(fp, "%lf ", M[i*m + j]);
        }
        fprintf(fp, "\n");
    }
    return 0;

}

int scanf_Matrix(double* M, int n, int m, FILE *fp);//n - strings, m - elements in one string
int scanf_Matrix(double* M, int n, int m, FILE *fp)//n - strings, m - elements in one string
{
    int st;
    for (int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            st = fscanf(fp, "%lf", &M[i*m + j]);
            if(st != 1)
            {
                if (st == 0)
                {
                    printf("Error: Not correct data!\n");
                    return -1;
                }
                else if(st == -1)
                {
                    printf("Error: Not enough data!\n");
                    return -1;
                }
                else
                {
                    printf("Error: Unexepted data input error!\n");
                    return -1;
                }
            }
        }
    }
    return 0;
}


int main(void)
{
    FILE *fin, *fout;
    int n, m;
    double* M;
    fin = fopen ("input.txt", "r");
    fout = fopen ("output.txt", "w");
    if(!fin)
    {
        printf ("Error: cannot open file!\n");
        return(-1);
    }
    if(!fscanf(fin, "%d", &n) || !fscanf(fin, "%d", &m))
    {
        printf("Error: not correct \'n\'!");
        return -1;
    }
    M = (double *)malloc(n*m*sizeof(double));
    if(scanf_Matrix(M, n, m, fin))
    {
        return -1;
    }
    printf_Matrix(M, n, m, fout);

}