1046

#include<stdio.h>


int main(){
	int n;
	int i;
	int number;
	int sum;
	
	scanf("%d",&n);
	sum=1;
	
	for(i=1;i<=n;i++)
	{
		scanf("%d",&number);
		if(number%2!=0)
		 sum*=number; 
		
		
	}
	
	printf("%d",sum);
	
	
	
	
	return 0;
}