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: Wrong Answer)

#include<bits/stdc++.h>
#define cases long long t;cin>>t;while(t--)
#define f_io ios::sync_with_stdio(false); cin.tie(0)
#define foi(a,n) for(long long i=a;i<n;i++)
#define foj(a,n) for(long long j=a;j<n;j++)
#define fok(a,n) for(long long k=a;k<n;k++)
#define ll long long
#define MOD 1000000007
#define INF 1000000000
using namespace std;

int main()
{
    f_io;
    string s,t;
    cin >> s >> t;
    ll l1 = (ll)s.length(),l2 = (ll)t.length();
    ll ans = l2;
    foi(0,l1-l2)
    {
        ll c = 0;
        foj(0,l2)
        {
            if(s[i+j]!=t[j])
                c++;
        }
        ans = min(ans,c);
    }
    cout << ans;
    return 0;
}