Compilare: main.cpp: In function 'void DFS1(int)': main.cpp:31:19: 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<graph[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void DFS2(int)': main.cpp:46:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i=0; i<graph_tr[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void DFS_arb(int, int)': main.cpp:71:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(int i=0; i<graph_ctc[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:131:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 131 | for(int j=0; j<graph[i].size(); j++) | ~^~~~~~~~~~~~~~~~