摘要：
#include #include #define N 60005struct st{ int x,y,sum,flag;}p[N * 4];void build(int r,int x,int y){ p[r].x = x; p[r].y = y; p[r].sum = 0; p[r].flag = 0; if(x == y) return ; int mid = (x + y) >> 1,tem = r > 1,tem = r mid) sum = query(tem + 1,x,y,val); else s... 阅读全文
