题解 | #跳台阶扩展问题#
跳台阶扩展问题
https://www.nowcoder.com/practice/953b74ca5c4d44bb91f39ac4ddea0fee
#include <iostream>
#include <cmath>
using namespace std;
int main() {
double a = 2.0;
double n = 0.0;
cin >> n;
a = pow (a, n - 1);
cout << a;
return 0;
}
// 64 位输出请用 printf("%lld")
