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#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
struct moomcake
{
double store; //【cation】这个可能是小数!
double sumPrice;
double solePrice;
}M[1010];
bool cmp(moomcake a,moomcake b)
{
return a.solePrice>b.solePrice;
}
int main()
{
memset(M,-1,sizeof(M));
int n;
double d;
scanf("%d%lf",&n,&d);
for(int i=0 ; i<n ; ++i)
scanf("%lf",&M[i].store);
for(int i=0 ; i<n ; ++i)
{
scanf("%lf",&M[i].sumPrice);
M[i].solePrice=M[i].sumPrice/M[i].store;
}
sort(M,M+n,cmp);
double p=0;
for(int i=0 ; i<n && d>0; ++i)
{
if(M[i].store<=d)
{
p+=M[i].sumPrice;
d-=M[i].store;
}
else if(M[i].store>d)
{
p+=M[i].solePrice*d;
break;
}
}
printf("%.2f\n",p);
return 0;
}
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原文地址:http://www.cnblogs.com/Evence/p/4325704.html