#include<stdio.h>
#include<math.h>
int main() {
	int n;
	scanf("%d",&n);
	while(n--) {
int m,s[101],i;
int ji=0,ou=0;
scanf("%d",&m);
if(m%2){for(i=1;i<=m;i++)scanf("%d",&s[i]);printf("YES\n");}
else {
	for(i=1;i<=m;i++)	{
scanf("%d",&s[i]);
if(!s[i] && i%2)ji++;
if(!s[i] && !(i%2))ou++;}
int dd;
        dd = ji-ou;	
        if (dd < 0) dd = -dd;	
if(dd<2)printf("YES\n");
else printf("NO\n");}
	}
	return 0;
}