【qbxt day1】 乱七八糟什么都有

1.读入输出问题

1. ios::sync_with_stdio(false);
2. scanf 读法 

   int x; scanf("%d",&x);
   double y; scanf("%lf",&y);
   char z[100]; scanf("%s",s+1);
   
   #ifdef WIN32
   #define LL "%l64d"
   #else
   #define LL "%lld"
   #endif 
   
   string s;
   scanf("%lld",&z)//unix linux ubuntu mac 
   scanf("%l64d",&z)//WIN32 
3. 快读模板

   inline int getint()
   {
       int x=0;
       char c=' ';
       while (c<'0' || c>'9')
           c=getchar();
       while (c>='0' && c<='9')
       {
           x=x*10+c-'0';
           c=getchar();
       }
       return x;
   }