Compilare: main.cpp: In member function 'void graf::ctc(unsigned int)': main.cpp:285:25: warning: unused variable 'nrctc' [-Wunused-variable] 285 | static unsigned int nrctc=0; | ^~~~~ main.cpp: In member function 'std::vector<std::vector<int> > graf::criticalConnections(int, std::vector<std::vector<int> >&)': main.cpp:432:16: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 432 | for (i=0; i<n; ++i) | ~^~ main.cpp: In function 'int main()': main.cpp:558:37: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 558 | for (unsigned int i=0; i<m; ++i) | ~^~ main.cpp: At global scope: main.cpp:285:25: warning: 'nrctc' defined but not used [-Wunused-variable] 285 | static unsigned int nrctc=0; | ^~~~~