Compilare: user.cpp: In function 'void tarjan(int, node**, int*, int*, bool*, int*, int*, int)': user.cpp:385: warning: comparison between signed and unsigned integer expressions user.cpp:419: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:590: warning: comparison between signed and unsigned integer expressions user.cpp:601: warning: 'q' is used uninitialized in this function user.cpp:601: warning: 'p' is used uninitialized in this function