关于测试点2：一开始amount我设的是int型，测试点2错误，看了网上的答案，把int改成float就对了（被给的example坑到了，没想到可以为小数

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
struct mk {float amount;float price;float per;
};
bool compare(mk m1, mk m2) {return m1.per > m2.per;
}
vector<mk>info;
int main() {int N,D; cin >> N>>D;info.resize(N);for (int i = 0; i < N; i++) cin >> info[i].amount;for (int i = 0; i < N; i++) {cin >> info[i].price;info[i].per = info[i].price / info[i].amount;}sort(info.begin(), info.end(), compare);int count = 0; float profit = 0;while (D != 0) {if(info[count].amount < D) {profit += info[count].amount * info[count].per;D -= info[count].amount;count++;}else {profit += D * info[count].per;D = 0;}if (count > N) break;}printf("%.2f" ,profit);return 0;
}