View Compilation Error

0_0_17632258_18104.cpp: In function 'int dfs(int, int, int, bool)':
0_0_17632258_18104.cpp:16:21: error: 'i' was not declared in this scope
     if(have == 0 && i == 1) have13 = 1;
                     ^
0_0_17632258_18104.cpp:17:21: error: 'i' was not declared in this scope
     if(have == 1 && i != 1) have13 = 0;
                     ^
0_0_17632258_18104.cpp:18:21: error: 'i' was not declared in this scope
     if(have == 1 && i == 3) have13 = 2;
                     ^
0_0_17632258_18104.cpp:20:9: error: 'ans' was not declared in this scope
         ans += dfs(pos - 1, (mod * 10 + i) % 13, have13, limit && i == last);
         ^
0_0_17632258_18104.cpp: In function 'int main()':
0_0_17632258_18104.cpp:33:33: error: 'memset' was not declared in this scope
         memset(bit,0,sizeof(bit));
                                 ^