const vector<string> lcs_vt(const string &str1, const string &str2)
{
    int col_num = str1.length();
    int row_num = str2.length();
    int map[row_num][col_num];

    bzero(map, sizeof(map));
    vector<string> ret;

    for(int i = 0; i < col_num; i++) {
        for(int j = 0; j < row_num; j++) {
            if (str1[i] == str2[j]) {
                map[j][i] = 1;
            }
        }
    }

    int list_flag = 0;
    string temp;
    for (int i = col_num - 1; i >= 0; i--) {
        int j = 0;
        temp = "";
        while(j + i < col_num && j < row_num) {
            if (map[j][j + i] == 1) {
                temp += str1[j + i];
            } else {
                temp += '#';
            }
            j++;
        }
        vector<string> splited_str = split_with_string(temp, "#");
        vector_unique(splited_str);
        for(unsigned int i = 0; i < splited_str.size(); i++) {
            ret.push_back(splited_str[i]);
        }
    }

    for (int i = 1; i < row_num; i++) {
        int j = 0;
        temp = "";
        while(j < col_num && j + i < row_num) {
            if (map[j + i][j] == 1) {
                temp += str2[j + i];
            } else {
                temp += '#';
            }
            j++;
        }
        //if (!(temp.empty())) {
        //  cout << "###" << temp << endl;
        //}
        vector<string> splited_str = split_with_string(temp, "#");
        vector_unique(splited_str);
        for(unsigned int i = 0; i < splited_str.size(); i++) {
            ret.push_back(splited_str[i]);
        }
    }
    return ret;
}