Compilare: user.cpp: In function ‘void prim()’: user.cpp:41:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<adiac[nod_start].size(); i++) { ~^~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:78:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<adiac[cur].size(); i++) { ~^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:106:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<adiac[i].size(); j++) { ~^~~~~~~~~~~~~~~~ user.cpp:119:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<muchii_alese.size(); i++) { ~^~~~~~~~~~~~~~~~~~~~