'commit'

TangDou/XiTi/1119.cpp

@@ -0,0 +1,28 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+//map排序(key)的比较器
+struct cmpFunction {
+    bool operator()(const int &k1, const int &k2) const {
+        return k1 < k2;
+    }
+};
+
+int main() {
+    int n;
+    cin >> n;
+    map<int, int, cmpFunction> _map;
+    for (int i = 0; i < n; ++i) {
+        int c;
+        cin >> c;
+        _map[c]++;
+    }
+    //输出结果
+    cout << _map.size() << endl;
+    for (map<int, int>::iterator iter = _map.begin(); iter != _map.end(); ++iter) {
+        cout << iter->first << " ";
+    }
+
+    return 0;
+}