规范格式

leetcode/0216.Combination-Sum-III/216. Combination Sum III.go

@@ -0,0 +1,28 @@
+package leetcode
+
+func combinationSum3(k int, n int) [][]int {
+	if k == 0 {
+		return [][]int{}
+	}
+	c, res := []int{}, [][]int{}
+	findcombinationSum3(k, n, 1, c, &res)
+	return res
+}
+
+func findcombinationSum3(k, target, index int, c []int, res *[][]int) {
+	if target == 0 {
+		if len(c) == k {
+			b := make([]int, len(c))
+			copy(b, c)
+			*res = append(*res, b)
+		}
+		return
+	}
+	for i := index; i < 10; i++ {
+		if target >= i {
+			c = append(c, i)
+			findcombinationSum3(k, target-i, i+1, c, res)
+			c = c[:len(c)-1]
+		}
+	}
+}