Compilare: main.cpp: In function 'int main()': main.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp:68:23: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if(v[i].first != node & v[i].second != node) main.cpp:68:31: warning: 'node' may be used uninitialized in this function [-Wmaybe-uninitialized] if(v[i].first != node & v[i].second != node)