#include <stdio.h>
#include <stdlib.h>
#define N 105
typedef unsigned long long ull;
int jV[N];
int jL[N];
ull jP[N];
long double jDP[N];
int lS[N];
int pS[N];

long double mat[101][101];

ull mer(int i, int j){
	return mat[i][j];
}

void get(int i){
	if(lS[i])get(lS[i]);
	if(pS[i])get(pS[i]);

	int a,b;
	if(lS[i])a=jL[lS[i]];
	else a=0;
	if(pS[i])b=jL[pS[i]];
	else b=0;
	jL[i]=a+b+1;
	

	//printf("asdf %d %d %d \n",jV[i],a,b);	
	jP[i] = jP[lS[i]]*jP[pS[i]]*mer(jL[lS[i]],jL[pS[i]]);
	jDP[i] = jDP[lS[i]]*jDP[pS[i]]*mer(jL[lS[i]],jL[pS[i]]);
//	printf("s:%d %d\n",jL[lS[i]],jL[pS[i]]);
//	printf("%d %llu %llu %llu\n",jV[i],jP[lS[i]],jP[pS[i]],mer(jL[lS[i]],jL[pS[i]]));
}

void initM(){
	int i,j;
	for(i=0;i<101;i++){
		mat[i][0]=1;
		mat[0][i]=1;
		mat[i][1]=i+1;
		mat[1][i]=i+1;
	}
	for(i=2;i<101;i++){
		for(j=2;j<101;j++){
			mat[i][j] = mat[i-1][j] + mat[i][j-1];
		}
	}
}

int main(){
	
	initM();
//	printf("a %llu %llu %llu %llu %llu %llu\n",mat[2][4],mat[4][2],mat[1][3],mat[3][1],mat[2][3],mat[3][2]);
	 ull kl = -1;
//	 printf("%llu\n",kl);

	while(1){
		int n,k,i;
		scanf("%d",&n);
		if(!n)return n;

		for(i=0;i<n;i++){jV[i] = jL[i] = lS[i] = pS[i] = 0; jP[i] = jDP[i] = 1;}

		scanf("%d",&jV[1]);	//prvni
		for(i=2;i<=n;i++){
			scanf("%d",&jV[i]);
			k=1;
			while(1){
				if(jV[i]>=jV[k]){
			//		printf("!");
					if(pS[k])k=pS[k];
					else { pS[k]=i; break;}
				}
				else{
			//		printf("?");
					if(lS[k])k=lS[k];
					else { lS[k]=i; break;}
				}
			}
		}

		get(1);
		printf("%.0Lf\n",jDP[1]);
	}

}