Compilare: user.cpp: In function ‘int main()’: user.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[vecin].size();j++) ~^~~~~~~~~~~~~~~~ user.cpp:72:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[nod].size();j++) ~^~~~~~~~~~~~~~ user.cpp:80:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[j]==v[nod].size()) ~~~~^~~~~~~~~~~~~~~ user.cpp:87:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[nod].size();j++) ~^~~~~~~~~~~~~~