leetcode290

public class Solution {
    public bool WordPattern(string pattern, string str) {
        var list = str.Split(' ').ToList();

            int type1 = 0;
            int type2 = 0;

            StringBuilder sb1 = new StringBuilder();
            StringBuilder sb2 = new StringBuilder();

            Dictionary<string, int> dic1 = new Dictionary<string, int>();
            Dictionary<char, int> dic2 = new Dictionary<char, int>();

            foreach (var word in list)
            {
                if (!dic1.ContainsKey(word))
                {
                    dic1.Add(word, type1);                     
                    sb1.Append(type1);
                    type1++;
                }
                else
                {
                    sb1.Append(dic1[word]);
                }
            }

            foreach (var c in pattern)
            {
                if (!dic2.ContainsKey(c))
                {
                    dic2.Add(c, type2);                    
                    sb2.Append(type2);
                    type2++;
                }
                else
                {
                    sb2.Append(dic2[c]);
                }
            }

            if (sb1.ToString() != sb2.ToString())
            {
                return false;
            }
            else
            {
                return true;
            }
    }
}

 https://leetcode.com/problems/word-pattern/#/description