Compilare: main.cpp: In function 'void dfs_sort_top(int)': main.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i=0; i<v[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i=0; i<vt[nod].size (); i++) | ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for (i=0; i<solf.size (); i++) | ~^~~~~~~~~~~~~ main.cpp:62:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (j=0; j<solf[i].size (); j++) | ~^~~~~~~~~~~~~~~~