812. 打印数字

https://www.acwing.com/problem/content/submission/code_detail/14063815/

AcWing/812/812.cpp

@@ -0,0 +1,23 @@
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+int n, k, x;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    cin >> n >> k;
+
+    while (n--) {
+        cin >> x;
+
+        if (k--) cout << x << ' ';
+    }
+
+    cout << endl;
+
+    return 0;
+}