Compilare: user.cpp: In function ‘int BFS(int)’: user.cpp:36:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[x].size(); i++) ^ user.cpp:27:6: warning: unused variable ‘ultim’ [-Wunused-variable] int ultim,x; ^ user.cpp: In function ‘void DFS(int, int)’: user.cpp:52:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:16:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:20:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x,&y); ^ user.cpp: In function ‘int BFS(int)’: user.cpp:45:9: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] return x; ^