View Compilation Error

0_0_25844942_8793.cpp: In member function 'int Trie::solve()':
0_0_25844942_8793.cpp:75:47: error: 'mod' was not declared in this scope
                         dp[newi][newj][newk]%=mod;
                                               ^
0_0_25844942_8793.cpp:87:22: error: 'mod' was not declared in this scope
                 ans%=mod;
                      ^