'commit'

LuoGu/RuMen/P1059_2.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int N;
+    int x;
+    set<int> set1;
+    cin >> N;
+    //输入
+    for (int i = 0; i < N; i++) {
+        cin >> x;
+        set1.insert(x);
+    }
+    //输出个数
+    cout << set1.size() << endl;
+    //迭代器.输出每一个数值
+    set<int>::iterator it;
+    for (it = set1.begin(); it != set1.end(); it++)
+        cout << *it << " ";
+    cout << endl;
+    return 0;
+}