View Compilation Error

0_0_26618941_5497.cpp: In function 'void init()':
0_0_26618941_5497.cpp:35:9: error: 'ji' was not declared in this scope
  memset(ji,0,sizeof(ji));
         ^
0_0_26618941_5497.cpp: In function 'void dfs(int, int)':
0_0_26618941_5497.cpp:56:9: error: 'x' was not declared in this scope
      ji[x]++;
         ^