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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