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 input; int result; int tmp[4] = {2,3,2,4}; while(cin>>input) { if(input == 1||input == 2) { result = -1; } else { result = tmp[(input -3)%4]; } cout << result <<endl; } return 0; }