diff options
Diffstat (limited to 'other/ways_to_paint_nx3_grid.cpp')
-rw-r--r-- | other/ways_to_paint_nx3_grid.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/other/ways_to_paint_nx3_grid.cpp b/other/ways_to_paint_nx3_grid.cpp new file mode 100644 index 0000000..b661af8 --- /dev/null +++ b/other/ways_to_paint_nx3_grid.cpp @@ -0,0 +1,20 @@ +#include "leetcode.h" + +class Solution { +public: + int numOfWays(int n) { + long a = 6, b = 6, c, d, mod = 1e9 + 7; + for (int i = 1; i < n; ++i) { + c = a * 3 + b * 2; + d = a * 2 + b * 2; + a = c % mod; + b = d % mod; + } + return (a + b) % mod; + } +}; + +int main() { + Solution obj; + cout << obj.numOfWays(1); +} |