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