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 <stdio.h>
#include <string.h>
int main(int argc, char *argv[])
{
	char s[1005],t[1005];
	scanf("%s%s",s,t);
	int i,j,k,len=strlen(s),min=10000,cnt;
	for(i=0;i<len-strlen(t)+1;i++){
		cnt=0;
		for(j=0,k=i;j<strlen(t);j++,k++){
			if(s[k]!=t[j])
				cnt++;
		}
		if(min>cnt)
			min=cnt;
	}
	printf("%d\n",min); 
}