Compilare: main.cpp: In function 'bool verif(int)': main.cpp:30:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:43:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<reverse[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int DFS(int)': main.cpp:62:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:64:17: warning: unused variable 'type' [-Wunused-variable] int type = edge[node][i].second; ^~~~ main.cpp:75:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:77:17: warning: unused variable 'type' [-Wunused-variable] int type = edge[node][i].second; ^~~~