delete pics to save space

history_source/信息学奥赛一本通/2.7.9.cpp

@@ -0,0 +1,34 @@
+#include<cstdio>
+int n,k,s;
+int len[10005];
+int main()
+{
+	scanf("%d%d",&n,&k);
+	double x;
+	int L=0,R=0,mid;
+	for(int i=0;i<n;i++)
+	{
+		scanf("%lf",&x);
+		len[i]=x*100;
+		R=(R>len[i]?R:len[i]);
+	}
+	R++;
+	while(L+1<R)
+	{
+		mid=(L+R)/2;
+		s=0;
+		for(int i=0;i<n;i++)
+			s+=len[i]/mid;
+		if(s>=k) L=mid;
+		else R=mid;
+	}
+	printf("%.2lf\n",(double)L/100);
+	return 0;
+}
+/*
+4 11
+8.02
+7.43
+4.57
+5.39
+*/