质疑者叫大声点！

//include <bits/stdc++.h> using namespace std; int main(){

double s,k,i,a,sn,n;
cin>>k;
s=0;
a=1;
while(s<=k){
	s=s+1.0/a;
	a++;
}i=a-1;
cout<<i;

return 0;

}