Compilare: user.cpp: In function ‘int main()’: user.cpp:40:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graf[i].size() > maxx) ^ user.cpp:51:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graf[i].size() > maxx) ^ user.cpp:59:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graf[i].size() > maxx) ^ user.cpp:20:12: warning: unused variable ‘y’ [-Wunused-variable] int x, y, c, nod, nod2, cost; ^ user.cpp:20:15: warning: unused variable ‘c’ [-Wunused-variable] int x, y, c, nod, nod2, cost; ^ user.cpp:20:18: warning: unused variable ‘nod’ [-Wunused-variable] int x, y, c, nod, nod2, cost; ^ user.cpp:20:23: warning: unused variable ‘nod2’ [-Wunused-variable] int x, y, c, nod, nod2, cost; ^ user.cpp:20:29: warning: unused variable ‘cost’ [-Wunused-variable] int x, y, c, nod, nod2, cost; ^ user.cpp:64:9: warning: ‘sol2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(sol2 < sol) swap(sol, sol2); ^ user.cpp:56:25: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] graf[sol].clear(); ^ user.cpp:45:17: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << sol; ^