View Compilation Error

0_0_26060110_3321.cpp: In function 'int dfs(int, int, int, bool)':
0_0_26060110_3321.cpp:7:8: error: 'pos' was not declared in this scope
     if(pos==-1)return 1;
        ^
0_0_26060110_3321.cpp:8:19: error: 'pos' was not declared in this scope
     if(!limit&&dp[pos][sta]!=-1)return dp[pos][sta];
                   ^
0_0_26060110_3321.cpp:9:20: error: 'pos' was not declared in this scope
     int up=limit?a[pos]:9;
                    ^