#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,k; double sum=0; cin>>k; n=0; while(sum<=k){ n++; sum+=1.0/n; } cout<<n; return 0; }