Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:40:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < lda[nod].size(); i++){ ^ user.cpp:41:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < lda[lda[nod][i]].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:57:15: warning: unused variable ‘j’ [-Wunused-variable] int x, y, i, j; ^