题解 | #跳台阶扩展问题#
跳台阶扩展问题
https://www.nowcoder.com/practice/953b74ca5c4d44bb91f39ac4ddea0fee
f(n)=f(n−1)+f(n−2)+⋯+f(1)+f(0)
f(n - 1) = f(n−2)+⋯+f(1)+f(0)
f(n) = 2 * f(n - 1)
#include <iostream>
using namespace std;
const int N = 50;
int f[N];
int main() {
int n;
cin >> n;
f[0] = 1;
for(int i = 1; i <= n; i ++){
f[i] = f[i - 1] * 2;
}
cout << f[n - 1] << endl;
return 0;
}
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