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(){
  char s[1001],t[1001];
  scanf("%s%*c%s",s,t);
  int slen=strlen(s),tlen=strlen(t),i,j;
  int min=tlen;
  for(i=0;i<slen-tlen+1;i++){
    int temp=0;
    for(j=0;j<tlen;j++){
      if(s[i+j]!=t[j])
        temp++;
    }
    if(temp<min)
      min=temp;
  }
  printf("%d\n",min);
  return 0;
}