POJ 1607

题意

在桌边放卡片，最多能超出桌边的距离

思路

画张图比较容易理解.

#include <iostream>
#include <iomanip>
#include <stdio.h>
using namespace std;

int main(){
    int n;
    double overhang = 0;

    while(cin>>n){
        cout<<"card"<<" overhang"<<endl;
        for(int i = 1;i<=n;i = i+1){
            overhang += 1.0/i;
        }
        overhang = overhang/2;

        printf("%d %.3f\n", n, overhang);
    }
    return 0;
}