please tell me what's in my code cpp
\n\n#define ll unsigned long long int\n#define mod (ll)( 1e9 + 7 )\nclass Solution {\n    \npublic:\n    \n    ll dp[502][52][52][2][2] ;\n    unordered_map<str
```\n\n#define ll unsigned long long int\n#define mod (ll)( 1e9 + 7 )\nclass Solution {\n    \npublic:\n    \n    ll dp[502][52][52][2][2] ;\n    unordered_map<string,bool> mp ;\n    \n    ll findGoodStrings(int n, string s1, string s2, string evil) {\n        \n        memset(dp,-1,sizeof dp) ;\n        \n        return get_ans(n,0,s1,s2,evil,0,0,0,0,"")%mod ;\n        \n    }\n    \n    ll get_ans(int n,int i,string s1,string s2,string evil,int pos,int lengthevil,bool c1,bool c2,string s){\n        \n        if(lengthevil == evil.size() )return 0 ;\n        \n        if(i==n){\n            if(mp[s]==0)\n            {mp[s]=1;return 1 ; }\n        }\n        \n        \n        if(dp[i][pos][lengthevil][c1][c2] != -1 )return (dp[i][pos][lengthevil][c1][c2]%mod) ;      \n\n\n        ll ans = 0 ;\n        int start = \'a\' ;\n        int end = \'z\' ;\n        \n        if(c1==0)start=s1[i] ;\n        if(c2==0)end= s2[i] ;\n        \n        for(int j= start ; j<=end ;j++){\n            char k = j ;\n            int pos2=0,length2=0 ;\n            bool c12=0,c22=0;\n            \n            if( k == evil[pos] ){pos2=pos+1;length2=lengthevil+1;}\n            \n            if(   k > s1[i] )c12=1;\n            if(   k < s2[i] )c22=1;\n            \n            ans+= ( get_ans(n,i+1,s1,s2,evil,pos2,length2,max(c1,c12),max(c2,c22),s+k) )%mod ;\n            ans=ans%mod ;\n            \n        }\n        \n        \n      return dp[i][pos][lengthevil][c1][c2] = ans%mod ; \n        \n        \n        \n    }\n    \n    \n    \n};\n```
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