delete pics to save space

history_source/信息学奥赛一本通/2.6.3.cpp

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+#include<cstdio>
+#include<algorithm>
+using namespace std;
+double w;
+int s;
+struct Gold
+{
+	double g,V,prise;
+};
+Gold mon[110];
+bool cmp(Gold a,Gold b)
+{
+	return a.prise>b.prise;
+}
+double answer()
+{
+	sort(mon,mon+s,cmp);
+	double ans=0;
+	int i=0;
+	while(w>0&&i<s)
+	{
+		if(w>=mon[i].g)
+		{
+			ans+=mon[i].V;
+			w-=mon[i].g;
+		}
+		else ans+=mon[i].prise*w,w=0;
+		i++;
+	}
+	return ans;
+}
+int main()
+{
+	int k;
+	scanf("%d",&k);
+	double ans[k];
+	for(int i=0;i<k;i++)
+	{
+		scanf("%lf%d",&w,&s);
+		for(int j=0;j<s;j++) scanf("%lf%lf",&mon[j].g,&mon[j].V),mon[j].prise=mon[j].V/mon[j].g;
+		ans[i]=answer();
+	}
+	for(int i=0;i<k;i++) printf("%.2lf\n",ans[i]);
+	return 0;
+}
+