#include<iostream>#include<cmath>usingnamespacestd;
//1.概率：n个人取到的不是自己名字的序列个数/n个人可能抽取的所有可能性longlongNotSelf(intn)
{
if (n==1 )
return0;
if (n==2)
return1;
return (n-1) * (NotSelf(n-1) +NotSelf(n-2));
}
longlongCount(intn)
{
doubles=1;
doublem=1;
for (inti=2; i<=n; ++i)
    {
m*=i;
    }
returnm;
}
intmain()
{
intn;
while (cin>>n)
    {
doubleret= (double)NotSelf(n)/Count(n);         //计算概率printf("%2.2f%%\n", ret*100);
    }
return0;
}

#include<iostream>#include<string>usingnamespacestd;
intmain()
{
strings, res;
while (getline(cin, s))
    {
getline(cin, res);
boolflag=false;
for (inti=0; i<s.size(); i++)
        {
stringt;
if (s[i] =='"')
            {
i++;
while (i<s.size() &&s[i] !='"')
                {
t+=s[i];
i++;
                }
if (t==res)
                {
flag=true;
break;
                }
            }
elseif (s[i] !=',')
            {
while (i<s.size() &&s[i] !=',')
                {
t+=s[i];
i++;
                }
if (t==res)
                {
flag=true;
break;
                }
            }
        }
if (flag==true)
        {
cout<<"Ignore"<<endl;
        }
elsecout<<"Important!"<<endl;
    }
return0;
}