#include "stdio.h"int main(void){	int i, j, num;	int OddSum = 1;		while(scanf("%d", &j) != EOF){		for(i=0; i<j; i++){			scanf("%d", &num);						if(num % 2 != 0){				OddSum *= num;			}		}				printf("%d\n", OddSum);				OddSum = 1;	}		return 0;}