删掉没用的

8.10/I-Wall/main.cpp

@@ -1,13 +1,10 @@
 //²Î¿¼±ðÈ赀 
-#include <iostream>
 #include <cmath>
 #include <cstdio>
 #include <algorithm>
-#include<stack>
 using namespace std;
 const double pi=acos(-1.00),eps = 1e-8;//pi3.14~
 const int N=1005,inf=0x3f3f3f3f;
-double ans=0;
 int q[N],n;
 struct Point{
     double x,y;
@@ -27,16 +24,11 @@ struct Point{
 		return a.y<b.y;
 	}
 }p[N];
-//stack<int>s;
 int sign(double d)
 {
 	if(fabs(d)<eps) return 0;
 	return d>0? 1:-1;
 }
-//double cross(double x1, double y1, double x2, double y2)
-//{
-//	return x1 * y2 - x2 * y1;
-//}
 double dist(Point a,Point b)
 {
 	Point c=a-b;
@@ -70,7 +62,7 @@ double Graham()
 }
 int main()
 {
-	int l,minn=1,f,ff,x0,x1,x2,y1,y2,y0;
+	int l;
     scanf("%d%d",&n,&l);
     for(int i=1;i<=n;i++)
     {