View Compilation Error

0_0_32433828_31658.cpp: In function 'int bfs(int, int, int)':
0_0_32433828_31658.cpp:59:12: error: 'depth' was not declared in this scope
     memset(depth,0,sizeof(dep));
            ^
0_0_32433828_31658.cpp:67:24: error: 'n' was not declared in this scope
         for(int i=1;i<=n;i++){
                        ^