标签：des style class blog code java
5 3 7 2 4 3 5 2 20 3 25 18 24 15 15 10 -1 -1
13.333 31.500
贪心法水题，
个人觉得这句话难理解：he may get J[i]* a% pounds of JavaBeans if he pays F[i]* a% pounds of cat food
这样表达可以购买几分之几的。
#include <stdio.h>
#include <vector>
#include <algorithm>
using namespace std;
struct twoInts
{
int j, f;
bool operator<(const twoInts two) const
{
double a = (double)j / (double)f;
double b = (double)two.j / (double)two.f;
return a > b;
}
};
int main()
{
int M, N;
while (scanf("%d %d", &M, &N) && -1 != M)
{
vector<twoInts> vt(N);
for (int i = 0; i < N; i++)
{
scanf("%d", &vt[i].j);
scanf("%d", &vt[i].f);
}
sort(vt.begin(), vt.end());
double maxBean = 0.0;
for (int i = 0; i < N; i++)
{
if (M >= vt[i].f)
{
maxBean += vt[i].j;
M -= vt[i].f;
}
else
{
maxBean += (double)vt[i].j * M / (double)vt[i].f;
break;
}
}
printf("%.3lf\n", maxBean);
}
return 0;
}
HDU 1009 FatMouse' Trade题解,布布扣,bubuko.com
标签：des style class blog code java
原文地址：http://blog.csdn.net/kenden23/article/details/31418535
