#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,i; double sn=1; cin>>k; for(i=1;sn<=k; ){ i++; sn+=1.0/i; } cout<<i; return 0; }