View Compilation Error

0_0_29877304_7229.cpp:25:12: error: size of array 'p' is not an integral constant-expression
 Node p[maxn],temp,ans[maxn];
            ^
0_0_29877304_7229.cpp:25:27: error: size of array 'ans' is not an integral constant-expression
 Node p[maxn],temp,ans[maxn];
                           ^
0_0_29877304_7229.cpp:37:10: error: size of array 'KDT' is not an integral constant-expression
 }KDT[maxn];
          ^