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)

#![allow(unused_imports)]
#![allow(dead_code)]
use proconio::input;
use proconio::fastout;
#[macro_use] extern crate text_io;
use proconio::marker::*;
use std::mem::*;
use std::collections::*;
use std::cmp::*;

#[fastout]
fn main() {
    input!{
        s:Chars,t:Chars,
    }
    let mut ans:i32=std::i32::MAX;
    for i in 0..s.len()-t.len()+1{
        let mut cnt:i32=0;
        for j in 0..t.len(){
            if s[i+j]!=t[j]{
                cnt+=1;
            }
        }
        if ans>cnt{
            ans=cnt;
        }
    }
    println!("{}",ans);
}