acm题目常用的预处理
#include<iostream>#include<sstream>#include<fstream>#include<vector>#include<list>#include<deque>#include<queue>#include<stack>#include<map>#include<set>#include<bitset>#include<algorithm>#include<cstdio>#include<cstdlib>#include<cstring>#include<cctype>#include<cmath>#include<ctime>#define L(x) ((x)<<1)#define R(x) (((x)<<1)+1)#define Half(x) ((x)>>1)#define lowbit(x) ((x)&(-(x)))using namespace std;const int kInf(0x7f7f7f7f);const double kEps(1e-8);typedef long long int64;typedef unsigned long long uint64;
