输入外挂

int Scan(){int res = 0, ch, flag = 0;if((ch = getchar()) == '-')//判断正负flag = 1;else if(ch >= '0' && ch <= '9')//得到完整的数res = ch - '0';while((ch = getchar()) >= '0' && ch <= '9' )res = res * 10 + ch - '0';return flag ? -res : res;}

void scanf_(int &num){    char in;    bool neg=false;    while(((in=getchar()) > '9' || in<'0') && in!='-') ;    if(in=='-')    {        neg=true;        while((in=getchar()) >'9' || in<'0');    }    num=in-'0';    while(in=getchar(),in>='0'&&in<='9')        num*=10,num+=in-'0';    if(neg)        num=0-num;}

inline void scanf_(int &num)//无负数{    char in;    while((in=getchar()) > '9' || in<'0') ;    num=in-'0';    while(in=getchar(),in>='0'&&in<='9')        num*=10,num+=in-'0';}