编辑代码

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int lcs( string &str1,string &str2,vector< vector<int> >& c )
{

    const int len1 = str1.length();
    const int len2 = str2.length();

    for( int i=0;i<=len1;++