Compilare: main.cpp: In function 'long long int dfs(int)': main.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graf[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:89:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < costMuchii.size() ; i++) ~~^~~~~~~~~~~~~~~~~~~