Compilare: main.cpp: In function 'void dfs(int, int, g_t<int>&, g_t<bool>&)': main.cpp:10:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int>, std::allocator<std::vector<int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | if (2*n < g.size()) { | ~~~~^~~~~~~~~~ main.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for (int i = 0; i < g[n].size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i = 0; i < g[n].size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int i = 0; i < g[n].size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int j = 0; j < g[i].size(); j++) { | ~~^~~~~~~~~~~~~ main.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int j = 0; j < g[i].size(); j++) { | ~~^~~~~~~~~~~~~