0_0_30972380_13478.cpp: In function 'void tarjan(int)':
0_0_30972380_13478.cpp:30:13: error: expected ')' before '{' token
if(!dfn[v]{
^
0_0_30972380_13478.cpp: In function 'int main()':
0_0_30972380_13478.cpp:59:2: error: 'x' was not declared in this scope
x
^
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