init commit

archive/algorithm/leetcode/22.go

@@ -0,0 +1,27 @@
+package main
+
+func dfs(str string, ret *[]string, n, l, r int) {
+	if r >= n {
+		*ret = append(*ret, str)
+		return
+	}
+	if l < n {
+		dfs(str+"(", ret, n, l+1, r)
+	}
+	if r < l {
+		dfs(str+")", ret, n, l, r+1)
+	}
+}
+
+func generateParenthesis(n int) []string {
+	ret := []string{}
+	dfs("", &ret, n, 0, 0)
+	return ret
+}
+
+func main() {
+	ret := generateParenthesis(3)
+	for _, val := range ret {
+		println(val + " ")
+	}
+}