Compilare: main.cpp: In function 'void DFS(int, int)': main.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:80:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~ main.cpp:83:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < sol[i].size(); j++) ~~^~~~~~~~~~~~~~~