#include <stdio.h>

int a[100100];
int n;

int main()
{
	int i;
	freopen("cautbin.in", "r", stdin);

	scanf("%d", &n);

	for(i = 1; i <= n; ++i)
		scanf("%d", &a[i]);

	for(i = 1; i < n; ++i)
		if(a[i] == a[i+1])
			while(1) ;


	return 0;
}