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 <stdio.h>
#include <string.h>

int main() {
    char S[1000], T[1000];
    int num, ans, i, j;

    scanf("%s", S);
    scanf("%s", T);

    int s = strlen(S);
    int t = strlen(T);

    for(i=0; i <= s-t; i++) {
        num = 0;
        for(j=0; j < t; j++) {
            if(S[i+j] == T[j]) num++;
        }

        if(num > ans) ans = num;
    }

    printf("%d\n", t - ans);
    return 0;
}