diff options
Diffstat (limited to 'other/combinations.cpp')
-rw-r--r-- | other/combinations.cpp | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/other/combinations.cpp b/other/combinations.cpp deleted file mode 100644 index 94d4bfc..0000000 --- a/other/combinations.cpp +++ /dev/null @@ -1,39 +0,0 @@ -// 77. Combinations -#include "leetcode.h" - -/* - * given two integers 'n' and 'k', return all possible combinations of 'k' - * numbers chosen from the range '[1, n]'. you may return the answer in any - * order - */ - -class Solution { -public: - vvd combine(int n, int k) { - vvd ans; - int i = 0; - vector<int> p(k, 0); - while (i >= 0) { - p[i]++; - if (p[i] > n) - --i; - else if (i == k - 1) - ans.push_back(p); - else - i++, p[i] = p[i - 1]; - } - return ans; - } -}; - -int main() { - Solution obj; - for (auto i : obj.combine(4, 2)) - for (auto j : i) - printf("%d ", j); // expect: [[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]] - printf("\n"); - for (auto i : obj.combine(1, 1)) - for (auto j : i) - printf("%d ", j); // expect: [[1]] - printf("\n"); -} |