摘要:
#include#include#include#includeusing namespace std;#define N 110000int pre[N],ch[N][2];int e[N],ne[N*2],v[N*2];int nn,m;int col[N];int lc[N],sm[N],rc... 阅读全文
摘要:
#include#include#include#include#includeusing namespace std;typedef double dd;const dd pi=acos(0.0)*2;#define N 400005struct P{ dd x,y; P(dd A=0... 阅读全文