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LeetCode_20_2.cs
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50 lines (47 loc) · 1.14 KB
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace leetcode
{
public class 有效的括号
{
public bool IsValid(string s)
{
Stack<char> ts = new Stack<char>();
Dictionary<char, char> dic = new Dictionary<char, char>();
dic.Add(')', '(');
dic.Add('}', '{');
dic.Add(']', '[');
foreach (var item in s)
{
if (dic.ContainsKey(item))
{
if (ts.Count <= 0)
{
return false;
}
var left = ts.Pop();
if (left != dic[item])
{
return false;
}
}
else
{
ts.Push(item);
}
}
if (ts.Count > 0)
{
return false;
}
else
{
return true;
}
}
}
}