Palindrome Partitioning

Given a string s, partition s such that
every substring of the partition is a palindrome.

Return all possible palindrome partitioning of s.

For example,
given s = "aab",
Return

  [

    ["aa","b"],

    ["a","a","b"]

  ]

class Solution {

public:

    vector<vector<string>> partition(string s)

    {

        vector<vector<string>> result;

        vector<string> v;

        for(int i=0;i<s.length();i++) v.push_back(" ");

        generate(s,result,v,0,0);

        return result;

    }

    bool check(const string& s,int l,int r)

    {

        while(l<r && s[l]==s[r])

        {

            l++;

            r--;

        }

        if(l>=r)

            return true;

        else

            return false;

    }

    void generate(string& s,vector<vector<string>>& result,vector<string>& v,int sdep,int vdep)

    {

        if(sdep==s.length())

        {

            vector<string> vnew;

            for(int i=0;i<vdep;i++)

                vnew.push_back(v[i]);

            result.push_back(vnew);

            return;

        }

        string news="";

        for(int i=sdep;i<s.length();i++)

        {

            news=news+s[i];

            if(check(s,sdep,i))

            {

                v[vdep]=news;

                generate(s,result,v,i+1,vdep+1);

            }

        }

    }

};

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