bzoj 1193

http://www.lydsy.com/JudgeOnline/problem.php?id=1193

大范围贪心，小范围宽搜。

膜拜大神

http://blog.csdn.net/u012915516/article/details/47447703

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<fstream>
#include<algorithm>
#include<cstring>
#include<string>
#include<cmath>
#include<queue>
#include<stack>
#include<map>
#include<utility>
#include<set>
#include<bitset>
#include<vector>
#include<functional>
#include<deque>
#include<cctype>
#include<climits>
#include<complex>
//#include<bits/stdc++.h>适用于CF,UOJ，但不适用于poj

using namespace std;

typedef long long LL;
typedef double DB;
typedef pair<int,int> PII;
typedef complex<DB> CP;

#define mmst(a,v) memset(a,v,sizeof(a))
#define mmcy(a,b) memcpy(a,b,sizeof(a))
#define fill(a,l,r,v) fill(a+l,a+r+1,v)
#define re(i,a,b)  for(i=(a);i<=(b);i++)
#define red(i,a,b) for(i=(a);i>=(b);i--)
#define ire(i,x) for(typedef(x.begin()) i=x.begin();i!=x.end();i++)
#define fi first
#define se second
#define m_p(a,b) make_pair(a,b)
#define SF scanf
#define PF printf
#define two(k) (1<<(k))

template<class T>inline T sqr(T x){return x*x;}
template<class T>inline void upmin(T &t,T tmp){if(t>tmp)t=tmp;}
template<class T>inline void upmax(T &t,T tmp){if(t<tmp)t=tmp;}

const DB EPS=1e-;
inline int sgn(DB x){if(abs(x)<EPS)return ;return(x>)?:-;}
const DB Pi=acos(-1.0);

inline int gint()
  {
        int res=;bool neg=;char z;
        for(z=getchar();z!=EOF && z!='-' && !isdigit(z);z=getchar());
        if(z==EOF)return ;
        if(z=='-'){neg=;z=getchar();}
        for(;z!=EOF && isdigit(z);res=res*+z-'',z=getchar());
        return (neg)?-res:res;
    }
inline LL gll()
  {
      LL res=;bool neg=;char z;
        for(z=getchar();z!=EOF && z!='-' && !isdigit(z);z=getchar());
        if(z==EOF)return ;
        if(z=='-'){neg=;z=getchar();}
        for(;z!=EOF && isdigit(z);res=res*+z-'',z=getchar());
        return (neg)?-res:res;
    }

const int dx[]={,,,,-,-,-,-};
const int dy[]={,-,,-,,-,,-};

int sx,sy,ex,ey,x,y;
int cnt;

int vis[][];
#define vis(i,j) vis[i+1000][j+1000]

int head,tail;
PII que[];

int main()
  {
      freopen("bzoj1193.in","r",stdin);
        freopen("bzoj1193.out","w",stdout);
        int i;
        sx=gint();sy=gint();ex=gint();ey=gint();
        x=ex-sx;y=ey-sy;
        x=abs(x);y=abs(y);
        cnt=;
        while(x+y>=)
          {
              if(x<y)swap(x,y);
              if(x->*y)x-=;else x-=,y-=;
              cnt+=;
          }
        mmst(vis,-);
        que[head=tail=]=PII(,);
        vis(,)=;
        while(vis(x,y)==-)
            {
                int ax=que[head].fi,ay=que[head].se;head++;
                re(i,,)
                  {
                      int bx=ax+dx[i],by=ay+dy[i];
                      if(vis(bx,by)==-)
                        {
                            que[++tail]=PII(bx,by);
                            vis(bx,by)=vis(ax,ay)+;
                            if(vis(x,y)!=-)break;
                        }
                  }
            }
        cnt+=vis(x,y);
        PF("%d\n",cnt);
        return ;
    }