C :

int main(int argc, char* argv[])
{
	double sum;
	int k,i;
	 while(~scanf("%d",&k))
	 {
		 sum=0;
	   for(i=1;;i++)
	   {
         sum+=1.0/i;	   
	      if(sum>k) break;
	   }
	    printf("%d\n",i);
	 }
	return 0;
}

C++ :

#include<iostream>
using namespace std;
int a[]={0,2,4,11,31,83,227,616,1674,4550,12367,33617,91380,248397,675214,1835421};
int main()
{
    int n;
    while(cin>>n) cout<<a[n]<<endl;
    return 0;
}

Pascal :

var
  K: Byte;
  n: Longint;
  Sn: Extended;

begin
  Readln(K);
  Sn := 0; n := 0;
  Repeat
    Inc(n);
    Sn := Sn + 1 / n;
  Until Sn > k;
  Writeln(n);
end.

Python :

# coding=utf-8
k=int(input())
sn=0
n=0
while True:
    n=n+1
    sn=sn+1/n
    if(sn>k):
        break
print(n)