Compilare: user.cpp: In function ‘void constr()’: user.cpp:67:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v[nod].size();k++) ^ user.cpp:71:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[vec].size() && ok;j++) ^ user.cpp: In function ‘int main()’: user.cpp:120:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<g[i].size();k++) ^ user.cpp:130:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<g[i].size();k++) ^ user.cpp:144:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<g[i].size();k++) ^