cpx17852033609的博客

敌兵布阵Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 120531    Accepted Submission(s): 50421 Problem DescriptionC国的死对头A国这段时间正在进行军事演习，所以C国...

//单点修改 区间求和#define Max 41234int ans;int data[Max],sum[4*Max];void creat(int l,int r,int root){    if(l==r)        {            sum[root]=data[l];//更新叶子节点            return ;        }    int...