摘要：
Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the leve 阅读全文
摘要：
1 #include 2 using namespace std; 3 const int maxn = 1000 + 5; 4 int C[maxn], n; 5 6 int lowbit(int x) {return x & -x;} 7 8 int sum(int x) { 9 int ret = 0; 10 while(x) { 11 ... 阅读全文