delete pics to save space

1.2589.cpp

@@ -0,0 +1,47 @@
+#include<cstdio>
+#include<cmath>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=10;
+int n;
+double h[maxn],b[maxn],a[maxn],he[maxn][maxn],height[maxn],res=9005;
+int p[maxn];
+double get_height(double h1,double a1,double b1,double h2,double a2,double b2)
+{
+	if(b1>=a2) return h2;
+	if((a1-b1)/h1>=(a2-b2)/h2)
+	{
+		if(a1>=a2) return max(0.0,h2-(a2-b1)/(a1-b1)*h1);
+		else return max(0.0,(a1-b2)/(a2-b2)*h2-h1);
+	}
+	if(b1>=b2) return (b1-b2)/(a2-b2)*h2;
+	return 0;
+}
+double cal()
+{
+	for(int i=0;i<n;i++) height[i]=0;
+	double res=0;
+	for(int i=1;i<n;i++)
+	{
+		double &now=height[p[i]];
+		for(int j=0;j<i;j++) now=max(now,height[p[j]]+he[p[i]][p[j]]);
+	}
+	for(int i=0;i<n;i++) res=max(res,height[i]+h[i]);
+	return res;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&n);
+	for(int i=0;i<n;i++) scanf("%lf%lf%lf",&h[i],&b[i],&a[i]);
+	for(int i=0;i<n;i++) p[i]=i;
+	for(int i=0;i<n;i++) for(int j=0;j<n;j++) he[i][j]=get_height(h[i],a[i],b[i],h[j],a[j],b[j]);
+	do
+		res=min(res,cal());
+	while(next_permutation(p,p+n));
+	printf("%.0lf\n",res);
+	return 0;
+}