#include <stdio.h>
 
int main(void) {
	int t;
	scanf("%d",&t);
	while(t--){
		int n,i,prev=0,j,c=0;
		scanf("%d",&n);
		int arr[n];
		for(i=0;i<n;i++)
		  scanf("%d",&arr[i]);
		if(n%2 != 0){
	        for(i=0,j=n-1;i<j;i++,j--){
			   if(i==0){
			   	 if(arr[i]==arr[j] && (arr[i]-prev == 1))
			   	    c++;
			   }
			   else{
			   	if(arr[i]==arr[j] && (arr[i]-arr[i-1] == 1))
			   	    c++;
			   }
		    }
		    if(c == n/2)
		      printf("yes\n");
		    else
		      printf("no\n");
		}else{
			printf("no\n");
		}
 
	}
	// your code goes here
	return 0;
}
 

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7
5
1 2 3 2 1
7
2 3 4 5 4 3 2
5
1 2 3 4 3
5
1 3 5 3 1
7
1 2 3 4 3 2 1
4
1 2 3 2
4
1 2 2 1