View Compilation Error

0_0_26555556_16277.cpp: In function 'void dfs(int)':
0_0_26555556_16277.cpp:7:17: error: 'x' was not declared in this scope
     int tmp = ~(x&y);
                 ^
0_0_26555556_16277.cpp:7:19: error: 'y' was not declared in this scope
     int tmp = ~(x&y);
                   ^
0_0_26555556_16277.cpp:16:32: error: too many arguments to function 'void dfs(int)'
             dfs(dep+1,b[i],b[j]);
                                ^
0_0_26555556_16277.cpp:5:6: note: declared here
 void dfs(int dep)
      ^