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 Rust (1.42.0) (judge verdict: Accepted)

use proconio::input;
use proconio::marker::Bytes;

fn dist(a: &[u8], b: &[u8], min_dist: usize) -> usize {
    assert_eq!(a.len(), b.len());
    let mut dist: usize = 0;
    for i in 0 .. b.len() {
        if a[i] != b[i] {
            dist += 1;
            if dist >= min_dist {
                return dist;
            }
        }
    }
    return dist;
}

fn main() {
    input!{
        s: Bytes,
        t: Bytes,
    }

    let mut min_dist: usize = t.len();
    for i in 0 .. s.len() - t.len() + 1 {
        let d = dist(&s[i .. i + t.len()], &t, min_dist);
        if d < min_dist {
            min_dist = d;
            if min_dist == 0 {
                break;
            }
        }
    }
    println!("{}", min_dist);
}