int main() {
    int k;
    scanf("%d", &k);        
    double sum = 0.0;       
    int n = 0;             
    while (sum <= k) {
        n++;                
        sum += 1.0 / n;    
    }
    printf("%d\n", n);     
    return 0;
}

int main()
{
    int n,k;
    double sum=0.0;
    scanf("%d",&k);
    if(k==1)
    {
        n=2;
    }
    else if(k>1)
    {
        n=1;
        do
        {
            sum += 1.0/n;
            n++;
        }
        while(sum<k);
    }
    printf("%d",n);
    return 0;
}

#include<stdio.h> int main(){ int n=0,k=0,i=1; double sum=0.0; scanf("%d",&k); if(1<k){ do{ sum+=(1.0/i); i++;n=i; }while(sum<=k*1.0); printf("%d",n-1); } if(k==1){printf("2"); } return 0; }

#include <stdio.h>
int main()
{
	double sn = 0 * 1.0, d;
    int k, i = 1;
	scanf("%d", &k);
	while (sn <= k)
	{
		d = 1.0 / i;
		sn += d;
		i++;
	}
	printf("%d", i - 1);
	return 0;
}
/*各位佬能不能看一下我为什么输出i - 1正确，输出i不正确*/

#include<math.h>
#pragma warning(disable:4996) 
int main()
{
    int k, n = 1;
    double sum = 0;
    scanf("%d", &k);
    do
    {
        sum = sum + 1.0 / n;
        n++;
    } while (!(sum > k));
    printf("%d", n-1);
    return 0;
}