题解 | #杨辉三角的变形#
杨辉三角的变形
http://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
#include <iostream>
using namespace std;
int main()
{
int n;
while(cin>>n)
{
if(n<=2)
cout<<-1<<endl;
else
{
if(n%2==1)
cout<<2<<endl;
else if(n%4==2)
cout<<4<<endl;
else if(n%4==0)
cout<<3<<endl;
}
}
return 0;
}