View Compilation Error

0_0_24159622_3055.cpp: In function 'void tj2(int, int, int)':
0_0_24159622_3055.cpp:64:5: error: 'u' was not declared in this scope
  lw[u]=df[u]=++l;
     ^
0_0_24159622_3055.cpp:75:24: error: 'dfn' was not declared in this scope
   else lw[a]=min(lw[a],dfn[e[i].t]);
                        ^
0_0_24159622_3055.cpp:78:6: error: 'fa' was not declared in this scope
  if (fa==-1) --cc[a];
      ^