奮鬥

敌兵布阵//注意初始化  错了n次//2887286 2010-08-28 14:46:55 Accepted 1166 46MS 412K 855 B C++ 飞#include#include#include#includeusingnamespace std;int c[50005];int n;//重要……void init(){ memset(c,0,sizeof(c));}int lowbit(int k){return k&-k;}void add(int k,int d) {for ( ;