diff options
Diffstat (limited to 'pascals_triangle.cpp')
-rw-r--r-- | pascals_triangle.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/pascals_triangle.cpp b/pascals_triangle.cpp new file mode 100644 index 0000000..343c116 --- /dev/null +++ b/pascals_triangle.cpp @@ -0,0 +1,19 @@ +#include "leetcode.h" + +class Solution { +public: + vector<vector<int>> generate(int numRows) { + vector<vector<int>> ans(numRows); + for (int i = 0; i < numRows; i++) { + vector<int> row(i + 1, 1); + int mid = i >> 1; + for (int j = 1; j <= mid; j++) { + int val = ans[i - 1][j - 1] + ans[i - 1][j]; + row[j] = val; + row[row.size() - j - 1] = val; + } + ans[i] = row; + } + return ans; + } +}; |