#include <stdio.h>

void reverce (int v[],int size)
{
	int i,temp;
	for(i=0;i<=size/2-1;i++)
	{
		temp = v[i];
		v[i] = v[size-1-i];
		v[size-1-i] = temp;
	}
}
		
		

int main (void)
{
	int i,x=6000;
	int a[x];

	for(i=0;i<=x-1;i++)
	{
		a[i] = i+1;
	}

	printf("befor:");
	for(i=0;i<=(sizeof(a)/sizeof(int)-1);i++)
	{
		printf("%d ",a[i]);
	}
	printf("\n\n");

	reverce(a,sizeof(a)/sizeof(int));

	printf("after:");
	for(i=0;i<=(sizeof(a)/sizeof(int)-1);i++)
	{
		printf("%d ",a[i]);
	}
	printf("\n");
	return 0;
}