read函数和write函数

read 函数

inline 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*10+c-'0'; c=getchar();}
    return f*x;
}

write 函数

inline void write(int x)
{
    if(x<0) {putchar('-'); x=-x;}
    if(x>9) write(x/10);
    putchar(x%10+'0');
}