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 tmp(x) std::cout<<"& "<<(x)<<" &\n"
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
#define mp make_pair
#define pii pair<int,int>
typedef long long ll;

using namespace std;
const int maxn=2e5+100;
char s[1010],t[1010];
int main(){
	scanf("%s",s+1);
	scanf("%s",t+1);
	int ls=strlen(s+1),lt=strlen(t+1),ans=1010;
	rep(i,1,ls){
		int j=1,cnt=0;
		while(j<=lt&&i+j<=ls){
			if(t[j]==s[i+j-1])++cnt,++j;
			else ++j;
		}
		ans=min(ans,lt-cnt);
	}
	cout<<ans;
    
 
    return 0;
}