Leetcode Golang 64. Minimum Path Sum.go

func minPathSum(grid [][]int) int {
	m := len(grid)
	if m == 0 {
		return 0
	}
	n := len(grid[0])

	for i := 0; i < m; i++ {
		for j := 0; j < n; j++ {
			if i == 0 && j == 0 {
				continue
			}
			if i == 0 {
				grid[i][j] += grid[i][j-1]
			} else if j == 0 {
				grid[i][j] += grid[i-1][j]
			} else {
				grid[i][j] += mymin(grid[i-1][j], grid[i][j-1])
			}
		}
	}
	return grid[m-1][n-1]
}

func mymin(x, y int) int {
	if x > y {
		return y
	}
	return x
}