#include #include <math.h> #include #include <stdio.h> #include #include #include #include <string.h> #include using namespace std; #define LL long long const int N = 1e5 + 10; const int INF = 0x3f3f3f3f; int n,k; double s; int main() { cin>>k; while(s<=k) { n++; s+=1.0/n; } cout<<n; return 0; }