#include<stdio.h>
int main() {
    int n, i;
    scanf("%d",&n);
    
    int arr[n];
    int oddFound = 0;
    
    for (i = 0;i<n;i++){
        scanf("%d", &arr[i]);
        if (arr[i]% 2 !=0)
         oddFound = 1;
    }
    // if all elements are even 
    if(!oddFound) {
        printf("Invalid input");
        return 0;
}