u

2026-07-16 14:03:46 +08:00
parent 9abd1c8dd6
commit 4b12dd8f07
3 changed files with 144 additions and 0 deletions
@@ -0,0 +1,43 @@
+package top100liked
+
+import (
+	"fmt"
+	"testing"
+)
+
+// https://leetcode.cn/problems/valid-parentheses/description/?envType=study-plan-v2&envId=top-100-liked
+
+func isValid(s string) bool {
+	stack := []rune{}
+	for _, c := range s {
+		if c == '(' || c == '[' || c == '{' {
+			stack = append(stack, c)
+		} else {
+			if len(stack) == 0 {
+				return false
+			}
+			pre := stack[len(stack)-1]
+			stack = stack[:len(stack)-1]
+			if c == ')' && pre != '(' {
+				return false
+			}
+			if c == ']' && pre != '[' {
+				return false
+			}
+			if c == '}' && pre != '{' {
+				return false
+			}
+		}
+	}
+	return len(stack) == 0
+}
+
+func Test(t *testing.T) {
+	fmt.Println(isValid("()"))
+	fmt.Println(isValid("()[]{}"))
+	fmt.Println(isValid("(]"))
+	fmt.Println(isValid("([])"))
+	fmt.Println(isValid("([)]"))
+	fmt.Println(isValid("("))
+	fmt.Println(isValid("]"))
+}