#include<bits/stdc++.h> using namespace std; int a,i; double b; int main() { cin>>a; for(i=1;b<=a;i++) { b=b+1.0/i; } cout<<i-1; return 0; }

#include <bits/stdc++.h> using namespace std; int main(i) { int n,cnt=0; cin>>n; double sum=0; while(sum<=n) { cnt++; sum=sum+1.0/cnt; } cout<<cnt; }

#include <bits/stdc++.h> using namespace std; int main() { int n,cnt=0; cin>>n; double sum=0; while(sum<=n){ sum=sum+1.0/cnt; }