#include<stdio.h>
#define N 100

int main()
{
    int i,j,n;
    float A[N][N],b[N];
    FILE *fpt;
    
    printf("Nhap so n <= %d : ",N);
    scanf("%d",&n);

    /* Khoi tao du lieu */  
  
    for(i=0;i<n;i++)
    {
	if(i%2 == 0)
	    b[i] = random()%20;
	else
	    b[i] = (-1)*(random()%20);
    }

    for(i=0;i<n;i++)
    {
//	b[i] = 0.0;
	for(j=0;j<n;j++)
	{
	    if(i==j)
		A[i][j]=100+random()%5;
	    else
	    	A[i][j]=random()%5;
	}
    } 
  
    /* Thuc hien ghi len file  */
    fpt = fopen ("input.data","w");
    fprintf(fpt,"%d\n",n);
    for(i=0;i<n;i++)
    {
	for(j=0;j<n;j++)
	    fprintf(fpt,"%e ",A[i][j]);
	fprintf(fpt,"\n");
    }

    fprintf(fpt,"\n");
    for(i=0;i<n;i++)
    	fprintf(fpt,"%e ",b[i]);

    fclose(fpt); 
    return 0;
}