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Diffstat (limited to 'min_path_sum.c')
-rw-r--r-- | min_path_sum.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/min_path_sum.c b/min_path_sum.c new file mode 100644 index 0000000..f2cabbd --- /dev/null +++ b/min_path_sum.c @@ -0,0 +1,20 @@ +// 64. Minimum Path Sum +#include <math.h> + +// given 'm x n grid' filled with non-negative numbers, find a path from top +// left to bottom right, which minimises the sum of all numbers along its path + +int minPathSum(int **grid, int grid_size, int *grid_col_size) { + int i, j; + for (i = 0; i < grid_size; i++) { + for (j = 0; j < (*grid_col_size); j++) { + if (i - 1 >= 0 && j - 1 >= 0) + grid[i][j] += fmin(grid[i - 1][j], grid[i][j - 1]); + else if (i - 1 >= 0) + grid[i][j] += grid[i - 1][j]; + else if (j - 1 >= 0) + grid[i][j] += grid[i][j - 1]; + } + } + return grid[i - 1][j - 1]; +} |