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++ (GCC 9.2.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define  fo(i,n) for(ll i=0;i<n;i++)
#define rfo(i,n) for(ll i=n;i>=0;i--)
#define fori(it, x) for (__typeof((x).begin()) it = (x).begin(); it != (x).end(); it++)
#define pb push_back
#define deb(x) cout<< #x << " = "<<x<<endl;
#define F first
#define S second
#define MP make_pair
#define all(x) (x).begin(), (x).end()
void solve()
{
	string s,t;
	cin>>s>>t;
	ll ans=t.length();
	for(ll i=0;i<=s.length()-t.length();i++)
	{
			ll temp = 0;
			for(ll j=0;j<t.length();j++)
			{
				if(s[i+j] != t[j])
				{
					temp++;
				}
			}
			ans = min(temp,ans);
	}
	cout<<ans;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    solve();
    return 0;
}