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View Compilation Error

0_0_21598773_18552.cpp: In function 'void dfs1(int, int, int)':
0_0_21598773_18552.cpp:3:5: error: 'deep' was not declared in this scope
     deep[k]=d;
     ^
0_0_21598773_18552.cpp:4:5: error: 'fa' was not declared in this scope
     fa[k]=pre;
     ^
0_0_21598773_18552.cpp:5:5: error: 'siz' was not declared in this scope
     siz[k]=1;
     ^
0_0_21598773_18552.cpp:6:15: error: 'fir' was not declared in this scope
     for(int i=fir[k];~i;i=nex[i])
               ^
0_0_21598773_18552.cpp:6:27: error: 'nex' was not declared in this scope
     for(int i=fir[k];~i;i=nex[i])
                           ^
0_0_21598773_18552.cpp:8:15: error: 'v' was not declared in this scope
         int e=v[i];
               ^
0_0_21598773_18552.cpp:13:16: error: 'son' was not declared in this scope
             if(son[k]==-1||siz[son[k]]<siz[e]) son[k]=e;
                ^


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