Compilare: main.cpp: In function 'void tarjan(int)': main.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int i=0;i<v[k].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(i=0;i<S.size();i++,g<<'\n') | ~^~~~~~~~~ main.cpp:58:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for(j=0;j<S[i].size();j++) | ~^~~~~~~~~~~~ main.cpp: In function 'void tareconex(int)': main.cpp:15:14: warning: 'nod' is used uninitialized in this function [-Wuninitialized] 15 | while(nod!=k) | ~~~^~~