delete pics to save space

history_source/挑战程序设计竞赛/2.2.2.cpp

@@ -0,0 +1,36 @@
+#include<bits/stdc++.h>
+using namespace std;
+const int MAX_N=100000;
+int n,s[MAX_N],t[MAX_N];
+pair<int,int> itv[MAX_N];
+void solve()
+{
+	for(int i=0;i<n;i++)
+	{
+		itv[i].first=t[i];
+		itv[i].second=s[i];
+	}
+	sort(itv,itv+n);
+	int ans=0,t=0;
+	for(int i=0;i<n;i++)
+	{
+		if(t<itv[i].second)
+		{
+			ans++;
+			t=itv[i].first;
+		}
+	}
+	printf("%d\n",ans);
+}
+void init()
+{
+	scanf("%d",&n);
+	for(int i=0;i<n;i++) scanf("%d",s+i);
+	for(int i=0;i<n;i++) scanf("%d",t+i);
+}
+int main()
+{
+	init();
+	solve();
+	return 0;
+}