杭电1330

#include <iostream>#include <cstdio>using namespace std;int main(){int N;int i,flag=0;double sum;while(~scanf("%d",&N)){sum=0;if(flag==0){printf("# Cards  Overhang\n");flag=1;}for(i=1;i<=N;i++){sum+=1.0*1/i;}sum/=2;printf("%5d     %.3f\n",N,sum);}return 0;}