SGU 456 Annuity Payment Scheme

hust.111qqz@gmail.com (111qqz) — Thu, 30 Jul 2015 12:02:00 +0000

水题，推个公式出来，注意精度…一遍A

代码实现

 1
/*************************************************************************
> File Name: code/2015summer/#5/D.cpp
> Author: 111qqz
> Email: rkz2013@126.com
> Created Time: 2015年07月30日 星期四 13时17分26秒
************************************************************************/
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#include<iostream>
#include<iomanip>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<string>
#include<map>
#include<set>
#include<queue>
#include<vector>
#include<stack>
#define y0 abc111qqz
#define y1 hust111qqz
#define yn hez111qqz
#define j1 cute111qqz
#define tm crazy111qqz
#define lr dying111qqz
using namespace std;
#define REP(i, n) for (int i=0;i<int(n);++i)
typedef long long LL;
typedef unsigned long long ULL;
const int inf = 0x7fffffff;
int s,m,p;
double ans;
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double cal(double x,int n)
{
double res = 1.0;
for ( int i = 1 ; i <= n ; i++ )
{
res = res * x;
}
// cout<<"res:"<<res<<endl;
return res;
}
int main()
{
cin>>s>>m>>p;
double sum = 0;
double per = p*1.0/100+1;
for ( int i = 1 ; i <= m; i++ )
{
sum=sum+1.0/cal(per,i);
//	cout<<"sum:"<<sum<<endl;
}
// cout<<sum<<endl;
cout<<fixed<<setprecision(5)<<s*1.0/sum<<endl;
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return 0;
}

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SGU 456 Annuity Payment Scheme