View Compilation Error

0_0_33504641_21511.cpp:18:15: error: 'maxn' was not declared in this scope
 ll dp[20][20][maxn];
               ^
0_0_33504641_21511.cpp: In function 'll dfs(int, int, int, int)':
0_0_33504641_21511.cpp:32:14: error: 'dp' was not declared in this scope
     if(!lit&&dp[pos][x][sum]!=-1)
              ^
0_0_33504641_21511.cpp:46:9: error: 'dp' was not declared in this scope
         dp[pos][x][sum]=ans;
         ^
0_0_33504641_21511.cpp: In function 'int main()':
0_0_33504641_21511.cpp:86:8: error: 'dp' was not declared in this scope
     me(dp,-1);
        ^
0_0_33504641_21511.cpp:10:24: note: in definition of macro 'me'
 #define me(a,b) memset(a,b,sizeof(a))
                        ^