View Compilation Error

0_0_36571785_16080.cpp: In function 'int main()':
0_0_36571785_16080.cpp:22:4: error: 'dis' was not declared in this scope
    dis[i][i]=0;
    ^
0_0_36571785_16080.cpp:29:36: error: 'dis' was not declared in this scope
         for(int i=1;i<=n;i++) f[i]=dis[1][i];//存放顶点1可到达的路径长度 
                                    ^
0_0_36571785_16080.cpp:38:39: error: 'dis' was not declared in this scope
                 if ((f[i] == ink) && (dis[t][mi] > dis[i][mi])) t = i;
                                       ^
0_0_36571785_16080.cpp:39:27: error: 'dis' was not declared in this scope
             ans = max(ans,dis[t][mi]);
                           ^