/* 17	Se da o matrice A. Sa se inlocuiasca intre ele liniile 1 cu 2 ...
3 cu 4 etc. Daca matricea are numar de linii impar ultima linie ramine
neschimbata.   */

#include <stdio.h>
#include <conio.h>
#include <math.h>
int a[10][10],i,j,n,m,temp,f;

void main (void)
{ clrscr();
printf("n= ");scanf("%d",&n);
printf("m= ");scanf("%d",&m);

for (i=0;i<m;i++)
	for (j=0;j<n;j++)
	 {
	  printf (" valoarea a[%d][%d]=",i,j);
		scanf("%d",&a[i][j]);
	  }

if (( fmod(m,2))==0) {     i=0;
									while (i<(m-1))
									 {	for (j=0;j<n;j++)
									 {temp=a[i][j];
									 a[i][j]=a[i+1][j];
									 a[i+1][j]=temp;
									 }i+=2; }
									 }
						else { for (i=0;i<(m-1);i++)
									{for (j=0;j<n;j++)
									 {temp=a[i][j];
									 a[i][j]=a[i+1][j];
									 a[i+1][j]=temp;
									 }i++;}
									 }

  for (i=0;i<m;i++)
	{
	for (j=0;j<n;j++)
		  printf ("a[%d][%d]=%d  ",i,j,a[i][j]);
	printf(" \n");
	}

	getch();
	}