Compilare: main.cpp: In function 'void prim()': main.cpp:82:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<varf>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for(i=0; i<G[start].size(); i++) | ~^~~~~~~~~~~~~~~~ main.cpp:97:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<varf>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for(j=0; j<G[vf].size(); j++) | ~^~~~~~~~~~~~~ main.cpp:72:13: warning: unused variable 'x' [-Wunused-variable] 72 | int i,j,x,vf; | ^