Compilare: main.cpp: In function 'int main()': main.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<vecini[i].size(); j++) ~^~~~~~~~~~~~~~~~~ main.cpp:87:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<unpaired[i].size(); j++) ~^~~~~~~~~~~~~~~~~~~ main.cpp:96:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( perechi.rbegin()->first==perechi.size()-1 ) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~