#include<bits/stdc++.h> using namespace std; int main(){ int k,n=2; double s=1.0; cin>>k; while(s<=k){ s+=1.0/n; n+=1; } cout<<n-1; return 0; }

#include <iostream> using namespace std; int main() { int k,i; double n=0; cin>>k; for(i=1;;i++) { n=1.0/i+n; if(n>k) break; } cout<<i; }