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| author | crupest <crupest@outlook.com> | 2020-05-13 18:35:51 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2020-05-13 18:35:51 +0800 |
| commit | 4c214298836df78f4c39bc4461163287a7d3c10a (patch) | |
| tree | 65e4cfc5acba57182e4098fc9fcf67125edc600d /cpp/77.cpp | |
| parent | 2ee6240fb4b04e0f808e7cc6294baf596ef686ad (diff) | |
| download | solutions-4c214298836df78f4c39bc4461163287a7d3c10a.tar.gz solutions-4c214298836df78f4c39bc4461163287a7d3c10a.tar.bz2 solutions-4c214298836df78f4c39bc4461163287a7d3c10a.zip | |
Add problem 77 .
Diffstat (limited to 'cpp/77.cpp')
| -rw-r--r-- | cpp/77.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/cpp/77.cpp b/cpp/77.cpp new file mode 100644 index 0000000..ec09198 --- /dev/null +++ b/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 |