Compilare: main.cpp: In function 'void dfs(int)': main.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lista[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void intro_apm(int)': main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lista[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:12: warning: unused variable 'sol' [-Wunused-variable] int i, sol = 0; ^~~