Edit Distance 02-08-24 POTD.cpp

// https://www.geeksforgeeks.org/problems/edit-distance3702/1

class Solution
{
public:
    int editDistance(string str1, string str2)
    {
        int m = str1.size();
        int n = str2.size();

        vector<vector<int>> dp(m + 1, vector<int>(n + 1));

        for (int i = 0; i <= m; i++)
        {
            for (int j = 0; j <= n; j++)
            {
                if (i == 0)
                {
                    dp[i][j] = j;
                }

                else if (j == 0)
                {
                    dp[i][j] = i;
                }

                else if (str1[i - 1] == str2[j - 1])
                {
                    dp[i][j] = dp[i - 1][j - 1];
                }

                else
                {
                    dp[i][j] = 1 + min({dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]});
                }
            }
        }
        return dp[m][n];
    }
};