add solution of hw1

.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "nyplaylists",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${fileDirname}/${fileBasenameNoExtension}", // 指向你的可执行文件
+            "args": [
+                "playlist_tiny2.txt",
+                "actions2.txt",
+                "output.txt",
+                "debug"
+            ],
+            "cwd": "${fileDirname}",
+            "environment": [],
+            "MIMode": "gdb",
+            "miDebuggerPath": "/usr/bin/gdb",
+            "preLaunchTask": "C/C++: g++ build active file"
+        }
+    ]
+}