delete pics to save space

history_source/信息学奥赛一本通/1.4.1.15.cpp

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+#include<cstdio>
+#include<cmath> 
+using namespace std;
+struct Point
+{
+	double x,y,r;
+};
+double line(Point a)
+{
+	a.x=abs(a.x);
+	a.y=abs(a.y);
+	double s=sqrt(a.x*a.x+a.y*a.y);
+	double ans=s/50.0*2;
+	ans+=a.r*1.5;
+	return ans;
+}
+int main()
+{
+	double ans=0;
+	int n;
+	scanf("%d",&n);
+	Point wu[n];
+	for(int i=0;i<n;i++) scanf("%lf%lf%lf",&wu[i].x,&wu[i].y,&wu[i].r);
+	for(int i=0;i<n;i++) ans+=line(wu[i]);
+	ans=ceil(ans);
+	printf("%.0lf\n",ans);
+	return 0;
+}