View Compilation Error

0_0_16632204_17336.cpp: In function 'int main()':
0_0_16632204_17336.cpp:102:41: error: 'struct Tree' has no member named 'neg'
         for (int i=0;i<(N<<2);i++) I[i].neg=0;//这里初始化一开始忘了
                                         ^