Problem:
Score : 200 points

Problem Statement

Given are two strings S and T.

Let us change some of the characters in S so that T will be a substring of S.

At least how many characters do we need to change?

Here, a substring is a consecutive subsequence. For example, xxx is a substring of yxxxy, but not a substring of xxyxx.

Constraints

The lengths of S and T are each at least 1 and at most 1000.

The length of T is at most that of S.

S and T consist of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S
T

Output

Print the minimum number of characters in S that need to be changed.

Sample Input 1

cabacc
abc

Sample Output 1

1

For example, changing the fourth character a in S to c will match the second through fourth characters in S to T.

Since S itself does not have T as its substring, this number of changes - one - is the minimum needed.

Sample Input 2

codeforces
atcoder

Sample Output 2

6

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Threading;
using System.IO.Pipes;
using System.ComponentModel;
using System.Drawing;
using Microsoft.VisualBasic;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string S = Console.ReadLine();
            string T = Console.ReadLine();

            int Sl = S.Length;
            int Tl = T.Length;

            int ans = Tl;
            int tmp = 0;

            for (int i = 0; i < Sl - Tl + 1; i++) 
            {
                tmp = 0;
                for (int j= 0; j < Tl; j++)
                {
                    if (T[j] != S[j + i]) 
                    {
                        tmp++;
                    } 
                }

                if (tmp < ans) 
                {
                    ans = tmp;
                }

            }

            Console.WriteLine(ans);

        }

    }
}