文章目录
快读
int read()
{
int s = 0, f = 1;
char ch = getchar();
while(!isdigit(ch)) {
if(ch == '-') f = -1;
ch = getchar();
}
while(isdigit(ch)) {
s = s * 10 + ch - '0';
ch = getchar();
}
return s * f;
}
快写
void write(int x)
{
if(x < 0) {
putchar('-');
x = -x;
}
if(x > 9)
write(x/10);
putchar(x % 10 - '0');
return;
}