顿搜
飞过闲红千叶，夕岸在哪
类目归类
[LeetCode 44] Wildcard Matching [C#]
06/25
1. Runtime Distribution
2. Submission Details
3. Description
Implement wildcard pattern matching with support for '?' and '*'.
'?' Matches any single character.
'*' Matches any sequence of characters (including the empty sequence).
The matching should cover the entire input string (not partial).
The function prototype should be:
bool isMatch(const char s, const char p)
4. Example
isMatch("aa","a") → false
isMatch("aa","aa") → true
isMatch("aaa","aa") → false
isMatch("aa", "*") → true
isMatch("aa", "a*") → true
isMatch("ab", "?*") → true
isMatch("aab", "cab") → false
5. Code
using System;
using System.Diagnostics;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace Csharp.DP
{
[TestClass]
public class LeetCode0044
{
public bool IsMatch(string s, string p)
{
bool[,] dp = new bool[s.Length + 1, p.Length + 1];
int[] pos = new int[p.Length + 1];
pos[0] = p.Length > 0 && p[0] == '*' ? 1 : 0;
dp[0, 0] = true;
for (var j = 0; j < p.Length && p[j] == '*'; j++)
{
dp[0, j + 1] = true;
}
for (var i = 1; i <= s.Length; i++)
{
for (var j = 1; j <= p.Length; j++)
{
if (p[j - 1] == '*' && pos[j - 1] > 0)
{
dp[i, j] = true;
pos[j] = i;
}
else
{
dp[i, j] = (s[i - 1] == p[j - 1] || p[j - 1] == '?') && dp[i - 1, j - 1];
pos[j] = dp[i, j] ? i : pos[j];
}
}
}
return dp[s.Length, p.Length];
}
[TestMethod]
public void Test()
{
Trace.WriteLine(IsMatch("zacabz", "*a?b*"));
}
}
}
