Compilare: main.cpp: In function 'void citire()': main.cpp:19:13: warning: unused variable 'j' [-Wunused-variable] int j = 0; ^ main.cpp: In function 'void init()': main.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v2[i].size(); ++j) { ~~^~~~~~~~~~~~~~ main.cpp: In function 'int bfs()': main.cpp:41:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) { ~~^~~~~~~~~~~~~~~