delete pics to save space

7.2976.cpp

@@ -0,0 +1,32 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=1005;
+const double eps=1e-8;
+int n,k,a[maxn],b[maxn];
+double c[maxn];
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d%d",&n,&k)==2&&n)
+	{
+		for(int i=1;i<=n;i++) scanf("%d",&a[i]);
+		for(int i=1;i<=n;i++) scanf("%d",&b[i]);
+		double L=0,R=1,M;
+		for(int i=0;i<100;i++)
+		{
+			M=(L+R)/2;
+			for(int j=1;j<=n;j++) c[j]=a[j]-b[j]*M;
+			sort(c+1,c+1+n);
+			double res=0;
+			for(int j=k+1;j<=n;j++) res+=c[j];
+			if(res>eps) L=M;
+			else R=M;
+		}
+		printf("%.0lf\n",(L+R)*50);
+	}
+	return 0;
+}