#include <stdio.h>
int main(void) {
int t;
while(t--){
int n,i,prev=0,j,c=0;
int arr[n];
for(i=0;i<n;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)
else
}else{
}
}
// your code goes here
return 0;
}
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