Compilare: main.cpp: In function 'bool cuplaj(int, int)': main.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:67:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v2[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp:78:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<cycle.size();i++) ~^~~~~~~~~~~~~