2 files changed, 48 insertions, 1 deletions
diff --git a/works/solutions/cpp/.gitignore b/works/solutions/cpp/.gitignore
index adb36c8..d1d85a8 100644
--- a/works/solutions/cpp/.gitignore
+++ b/works/solutions/cpp/.gitignore
@@ -1 +1,3 @@
-*.exe
-\ No newline at end of file
+*.exe
+*.pdb
+*.ilk
+\ No newline at end of file
diff --git a/works/solutions/cpp/77.cpp b/works/solutions/cpp/77.cpp
new file mode 100644
index 0000000..ec09198
--- /dev/null
+++ b/works/solutions/cpp/77.cpp
@@ -0,0 +1,45 @@
+#include <vector>
+
+using std::vector;
+
+void combine1(int start, int end, int rest_select_count, vector<int> &head, vector<vector<int>> &result)
+{
+    if (rest_select_count == 0)
+    {
+        for (int i = start; i < end; i++)
+        {
+            head.push_back(i);
+            result.push_back(head);
+            head.pop_back();
+        }
+        return;
+    }
+
+    for (int i = start; i < end - rest_select_count; i++)
+    {
+        head.push_back(i);
+        combine1(i + 1, end, rest_select_count - 1, head, result);
+        head.pop_back();
+    }
+}
+
+class Solution
+{
+public:
+    vector<vector<int>> combine(int n, int k)
+    {
+        vector<vector<int>> result;
+
+        vector<int> head;
+        combine1(1, 1 + n, k - 1, head, result);
+
+        return result;
+    }
+};
+
+int main()
+{
+    Solution s;
+    auto result = s.combine(20, 16);
+    return 0;
+}
+\ No newline at end of file