最短编辑距离

最短编辑距离

输入样例：

5 
3 2 1 4 5
1 2 3 4 5

输出样例：

4

代码模板：

#include <iostream>
#include <algorithm>

using namespace std;

const int N = 1010;

int n, m;
char a[N], b[N];
int f[N][N];

int main()
{
    scanf("%d%s", &n, a + 1);
    scanf("%d%s", &m, b + 1);

    for (int i = 0; i <= m; i ++ ) f[0][i] = i;
    for (int i = 0; i <= n; i ++ ) f[i][0] = i;

    for (int i = 1; i <= n; i ++ )
        for (int j = 1; j <= m; j ++ )
        {
            f[i][j] = min(f[i - 1][j] + 1, f[i][j - 1] + 1);
            if (a[i] == b[j]) f[i][j] = min(f[i][j], f[i - 1][j - 1]);
            else f[i][j] = min(f[i][j], f[i - 1][j - 1] + 1);
        }

    printf("%d\n", f[n][m]);

    return 0;
}

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