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"; } }