题解 | 牛牛学数列2
牛牛学数列2
https://www.nowcoder.com/practice/fc72951f52984f3abd286d82eeffacba
#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
double num_result = 0.0;
cin >> n;
for (int i = 1; i <= n; i++) {
num_result += 1.0 / i;
}
cout << fixed << setprecision(6) << num_result << endl;
return 0;
}
