Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:35:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<L[x].size(); ++i) ^ user.cpp: In function ‘void citire()’: user.cpp:59:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &n, &m, &s); ^ user.cpp:62:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &x, &y); ^