This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
#include <bits/stdc++.h>
using namespace std;
const int N = 2010;
int f[N][N];
char a[N], b[N];
int al, bl;
/*
测试用例：
abcd
ebde
答案：3
*/
int dfs(int i, int j) {
if (i == 0) return j;
if (j == 0) return i;
if (~f[i][j]) return f[i][j];
//增加、删除
f[i][j] = min(dfs(i - 1, j) + 1, dfs(i, j - 1) + 1);
//修改
if (a[i] == b[j])
return f[i][j] = min(f[i][j], dfs(i - 1, j - 1));
else
return f[i][j] = min(f[i][j], dfs(i - 1, j - 1) + 1);
}
int main() {
memset(f, -1, sizeof f);
cin >> a + 1 >> b + 1;
al = strlen(a + 1), bl = strlen(b + 1);
printf("%d\n", dfs(al, bl));
return 0;
