hdu_5146

 1 #include "cstdio"
 2 
 3 #define MaxN 1111
 4 #define ACCEPT
 5 
 6 bool is_palindrome;
 7 int case_num, n, arr[MaxN];
 8 long long even_sum, odd_sum;
 9 
10 int main()
11 {
12     #ifndef ACCEPT
13         freopen("in.txt","r",stdin);        
14     #endif
15     scanf("%d",&case_num);
16     while(case_num--){
17         even_sum = odd_sum = 0;
18         is_palindrome = true;
19         scanf("%d",&n);
20         for(int i = 0; i < n; ++i){
21             scanf("%d",&arr[i]);
22             if(i&1)
23                 even_sum += arr[i];
24             else
25                 odd_sum += arr[i];
26             if(is_palindrome == true && i >= n>>1 && arr[i] != arr[n-i-1])
27                     is_palindrome = false;
28         }
29         if(even_sum == odd_sum && is_palindrome == false)
30             puts("Yes");
31         else
32             puts("No");
33     }
34 }