救命

Kinghero King of the summit 2022-07-08 10:36:11 2

#include <iostream>
#include <cstdio>
using namespace std;
int main() {
    double n, m;
    cin >> n;
    for (int i = 1; i <= n; i++) {
     m += 1.0 / i;
    }
    printf("%.2lf", m);
    return 0;
}