delete pics to save space

history_source/信息学奥赛一本通/2.7.3.cpp

@@ -0,0 +1,36 @@
+#include<cstdio>
+#include<vector>
+#include<algorithm>
+using namespace std;
+struct line
+{
+	int L,R;
+};
+bool cmp(line a,line b)
+{
+	if(a.L<b.L) return 1;
+	return 0;
+}
+vector <line> site;
+int main()
+{
+    int n;
+    scanf("%d",&n);
+    site.resize(n);
+    line a[n];
+    for(int i=0;i<n;i++) scanf("%d%d",&a[i].L,&a[i].R);
+    sort(a,a+n,cmp);
+    for(int i=0;i<n;i++) site[i]=a[i];
+    for(int i=0;i<site.size()-1;i++)
+    {
+    	if(site[i].R>=site[i+1].L)
+    	{
+    		site[i].R=(site[i].R>site[i+1].R)?site[i].R:site[i+1].R;
+    		site.erase(site.begin()+i+1);
+    		i=-1;
+		}
+	}
+	if(site.size()==1) printf("%d %d",site[0].L,site[0].R);
+	else printf("no");
+    return 0;
+}