快读 快写
快读
(位运算板子)
int read()
{
int x=0,f=1;char c=getchar();
while (c<'0'||c>'9') {if (c=='-') f=-1;c=getchar();}
while (c>='0'&&c<='9') {x=(x<<1)+(x<<3)+(c^48);c=getchar();}
return x*f;
}
快写
(递归实现)
void write(int x)
{
if (x<0) putchar('-'),x=-x;
if (x>9) write(x/10);
putchar(x%10+'0');return ;
}
字符串快读
(不能读入空格,换行,回车)
string input()
{
string str="";char c=getchar();
while (c==' '||c=='\n'||c=='\r') c=getchar();
while (c!=' '&&c!='\n'&&c!='\r') {str+=c;c=getchar();}
return str;
}