提交尝试但未通过的题

leetcode/9990377.Combination-Sum-IV/377. Combination Sum IV.go

@@ -0,0 +1,24 @@
+package leetcode
+
+func combinationSum4(nums []int, target int) int {
+	if len(nums) == 0 {
+		return 0
+	}
+	c, res := []int{}, 0
+	findcombinationSum4(nums, target, 0, c, &res)
+	return res
+}
+
+func findcombinationSum4(nums []int, target, index int, c []int, res *int) {
+	if target <= 0 {
+		if target == 0 {
+			*res++
+		}
+		return
+	}
+	for i := 0; i < len(nums); i++ {
+		c = append(c, nums[i])
+		findcombinationSum4(nums, target-nums[i], i, c, res)
+		c = c[:len(c)-1]
+	}
+}