delete pics to save space

history_source/信息学奥赛一本通/2.2.9.cpp

@@ -0,0 +1,20 @@
+#include<cstdio>
+using namespace std;
+int main()
+{
+	bool isc[1001]={0};
+	int x,n;
+	scanf("%d",&n);
+	for(int i=0;i<n;i++)
+	{
+		scanf("%d",&x);
+		isc[x]=1;
+	}
+	int ans=0;
+	for(int i=0;i<1001;i++) ans+=isc[i];
+	printf("%d\n",ans);
+	for(int i=0;i<1001;i++) if(isc[i]) printf("%d ",i);
+	printf("\n");
+	return 0;
+}
+