Compilare: user.cpp: In function ‘int searchNode(int, int)’: user.cpp:90:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<nd.size(); ++i) ^ user.cpp: In function ‘void erasePath(int, int)’: user.cpp:98:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[f].size(); ++i) ^ user.cpp: In function ‘void task2()’: user.cpp:128:9: warning: ‘root’ may be used uninitialized in this function [-Wmaybe-uninitialized] int root; bool ok=false; ^