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>
#define PI 3.1415926535897932
#define _GLIBCXX_DEBUG
using namespace std;
long long GCD(long long A,long long B){
  if(B==0){
    return A;
  }
  else{
    return GCD(B,A%B);
  }
}
int main() {
  
  string S,T;
  cin>>S>>T;
  
  int ans=10000;
  
  int count=0;
  
  
  for(int i=0;i<=S.size()-T.size();i++){
    string U=S.substr(i,T.size());
    for(int j=0;j<T.size();j++){
      if(U[j]!=T[j]){
        count++;
      }
    }
    
    ans=min(ans,count);
    count=0;
  }
  
  cout<<ans<<endl;
}