Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lista[x].size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp:23:13: warning: unused variable 'c' [-Wunused-variable] int c = lista[x][i].c; ^ main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lista[x].size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lista[x].size(); i++) ~~^~~~~~~~~~~~~~~~~