View Compilation Error

0_0_38738875_5194.cpp: In function 'void solve()':
0_0_38738875_5194.cpp:27:25: error: 'k' was not declared in this scope
   27 |                 f[i][j][k] = -1;
      |                         ^
0_0_38738875_5194.cpp:59:9: error: expected ',' or ';' before 'return'
   59 |         return f[u][l][r] = res;
      |         ^~~~~~
0_0_38738875_5194.cpp: At global scope:
0_0_38738875_5194.cpp:61:4: error: 'cout' does not name a type
   61 |    cout << dfs(dfs, 0, 0, 0) << "\n";
      |    ^~~~
0_0_38738875_5194.cpp:62:1: error: expected declaration before '}' token
   62 | }
      | ^