Compilare: main.cpp: In function 'void sum(int, int)': main.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vec[nod].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<vec[i].size() and maxim<=minim;++j) ~^~~~~~~~~~~~~~ main.cpp:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();++i) ~^~~~~~~~~~~